// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "public/fpdf_save.h"
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#include <vector>
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#include "core/fpdfapi/fpdf_edit/include/cpdf_creator.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_reference.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_stream_acc.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_string.h"
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#include "core/fxcrt/include/fx_ext.h"
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#include "fpdfsdk/include/fsdk_define.h"
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#include "public/fpdf_edit.h"
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#ifdef PDF_ENABLE_XFA
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#include "fpdfsdk/fpdfxfa/include/fpdfxfa_app.h"
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#include "fpdfsdk/fpdfxfa/include/fpdfxfa_doc.h"
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#include "fpdfsdk/fpdfxfa/include/fpdfxfa_util.h"
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#include "public/fpdf_formfill.h"
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#include "xfa/fxfa/include/cxfa_eventparam.h"
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#include "xfa/fxfa/include/xfa_checksum.h"
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#include "xfa/fxfa/include/xfa_ffapp.h"
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#include "xfa/fxfa/include/xfa_ffdocview.h"
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#include "xfa/fxfa/include/xfa_ffwidgethandler.h"
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#endif
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#if _FX_OS_ == _FX_ANDROID_
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#include "time.h"
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#else
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#include <ctime>
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#endif
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class CFX_IFileWrite final : public IFX_StreamWrite {
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public:
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CFX_IFileWrite();
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FX_BOOL Init(FPDF_FILEWRITE* pFileWriteStruct);
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FX_BOOL WriteBlock(const void* pData, size_t size) override;
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void Release() override;
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protected:
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~CFX_IFileWrite() override {}
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FPDF_FILEWRITE* m_pFileWriteStruct;
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};
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CFX_IFileWrite::CFX_IFileWrite() {
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m_pFileWriteStruct = nullptr;
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}
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FX_BOOL CFX_IFileWrite::Init(FPDF_FILEWRITE* pFileWriteStruct) {
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if (!pFileWriteStruct)
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return FALSE;
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m_pFileWriteStruct = pFileWriteStruct;
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return TRUE;
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}
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FX_BOOL CFX_IFileWrite::WriteBlock(const void* pData, size_t size) {
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if (!m_pFileWriteStruct)
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return FALSE;
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m_pFileWriteStruct->WriteBlock(m_pFileWriteStruct, pData, size);
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return TRUE;
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}
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void CFX_IFileWrite::Release() {
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delete this;
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}
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namespace {
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#ifdef PDF_ENABLE_XFA
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bool SaveXFADocumentData(CPDFXFA_Document* pDocument,
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std::vector<ScopedFileStream>* fileList) {
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if (!pDocument)
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return false;
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if (pDocument->GetDocType() != DOCTYPE_DYNAMIC_XFA &&
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pDocument->GetDocType() != DOCTYPE_STATIC_XFA)
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return true;
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if (!CPDFXFA_App::GetInstance()->GetXFAApp())
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return true;
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CXFA_FFDocView* pXFADocView = pDocument->GetXFADocView();
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if (!pXFADocView)
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return true;
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CPDF_Document* pPDFDocument = pDocument->GetPDFDoc();
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if (!pDocument)
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return false;
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CPDF_Dictionary* pRoot = pPDFDocument->GetRoot();
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if (!pRoot)
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return false;
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CPDF_Dictionary* pAcroForm = pRoot->GetDictBy("AcroForm");
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if (!pAcroForm)
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return false;
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CPDF_Object* pXFA = pAcroForm->GetObjectBy("XFA");
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if (!pXFA)
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return true;
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CPDF_Array* pArray = pXFA->AsArray();
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if (!pArray)
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return false;
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int size = pArray->GetCount();
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int iFormIndex = -1;
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int iDataSetsIndex = -1;
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int iTemplate = -1;
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int iLast = size - 2;
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for (int i = 0; i < size - 1; i++) {
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CPDF_Object* pPDFObj = pArray->GetObjectAt(i);
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if (!pPDFObj->IsString())
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continue;
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if (pPDFObj->GetString() == "form")
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iFormIndex = i + 1;
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else if (pPDFObj->GetString() == "datasets")
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iDataSetsIndex = i + 1;
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else if (pPDFObj->GetString() == "template")
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iTemplate = i + 1;
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}
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std::unique_ptr<CXFA_ChecksumContext> pContext(new CXFA_ChecksumContext);
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pContext->StartChecksum();
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// template
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if (iTemplate > -1) {
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CPDF_Stream* pTemplateStream = pArray->GetStreamAt(iTemplate);
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CPDF_StreamAcc streamAcc;
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streamAcc.LoadAllData(pTemplateStream);
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uint8_t* pData = (uint8_t*)streamAcc.GetData();
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uint32_t dwSize2 = streamAcc.GetSize();
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ScopedFileStream pTemplate(FX_CreateMemoryStream(pData, dwSize2));
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pContext->UpdateChecksum(pTemplate.get());
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}
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CPDF_Stream* pFormStream = nullptr;
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CPDF_Stream* pDataSetsStream = nullptr;
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if (iFormIndex != -1) {
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// Get form CPDF_Stream
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CPDF_Object* pFormPDFObj = pArray->GetObjectAt(iFormIndex);
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if (pFormPDFObj->IsReference()) {
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CPDF_Object* pFormDirectObj = pFormPDFObj->GetDirect();
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if (pFormDirectObj && pFormDirectObj->IsStream()) {
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pFormStream = (CPDF_Stream*)pFormDirectObj;
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}
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} else if (pFormPDFObj->IsStream()) {
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pFormStream = (CPDF_Stream*)pFormPDFObj;
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}
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}
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if (iDataSetsIndex != -1) {
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// Get datasets CPDF_Stream
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CPDF_Object* pDataSetsPDFObj = pArray->GetObjectAt(iDataSetsIndex);
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if (pDataSetsPDFObj->IsReference()) {
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CPDF_Reference* pDataSetsRefObj = (CPDF_Reference*)pDataSetsPDFObj;
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CPDF_Object* pDataSetsDirectObj = pDataSetsRefObj->GetDirect();
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if (pDataSetsDirectObj && pDataSetsDirectObj->IsStream()) {
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pDataSetsStream = (CPDF_Stream*)pDataSetsDirectObj;
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}
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} else if (pDataSetsPDFObj->IsStream()) {
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pDataSetsStream = (CPDF_Stream*)pDataSetsPDFObj;
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}
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}
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// L"datasets"
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{
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ScopedFileStream pDsfileWrite(FX_CreateMemoryStream());
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if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Datasets,
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pDsfileWrite.get(), nullptr) &&
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pDsfileWrite->GetSize() > 0) {
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// Datasets
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pContext->UpdateChecksum(pDsfileWrite.get());
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pContext->FinishChecksum();
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CPDF_Dictionary* pDataDict = new CPDF_Dictionary;
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if (iDataSetsIndex != -1) {
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if (pDataSetsStream)
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pDataSetsStream->InitStreamFromFile(pDsfileWrite.get(), pDataDict);
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} else {
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CPDF_Stream* pData = new CPDF_Stream(nullptr, 0, nullptr);
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pData->InitStreamFromFile(pDsfileWrite.get(), pDataDict);
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pPDFDocument->AddIndirectObject(pData);
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iLast = pArray->GetCount() - 2;
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pArray->InsertAt(iLast, new CPDF_String("datasets", FALSE));
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pArray->InsertAt(iLast + 1, pData, pPDFDocument);
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}
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fileList->push_back(std::move(pDsfileWrite));
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}
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}
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// L"form"
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{
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ScopedFileStream pfileWrite(FX_CreateMemoryStream());
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if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Form, pfileWrite.get(),
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pContext.get()) &&
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pfileWrite->GetSize() > 0) {
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CPDF_Dictionary* pDataDict = new CPDF_Dictionary;
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if (iFormIndex != -1) {
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if (pFormStream)
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pFormStream->InitStreamFromFile(pfileWrite.get(), pDataDict);
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} else {
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CPDF_Stream* pData = new CPDF_Stream(nullptr, 0, nullptr);
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pData->InitStreamFromFile(pfileWrite.get(), pDataDict);
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pPDFDocument->AddIndirectObject(pData);
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iLast = pArray->GetCount() - 2;
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pArray->InsertAt(iLast, new CPDF_String("form", FALSE));
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pArray->InsertAt(iLast + 1, pData, pPDFDocument);
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}
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fileList->push_back(std::move(pfileWrite));
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}
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}
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return true;
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}
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bool SendPostSaveToXFADoc(CPDFXFA_Document* pDocument) {
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if (!pDocument)
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return false;
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if (pDocument->GetDocType() != DOCTYPE_DYNAMIC_XFA &&
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pDocument->GetDocType() != DOCTYPE_STATIC_XFA)
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return true;
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CXFA_FFDocView* pXFADocView = pDocument->GetXFADocView();
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if (!pXFADocView)
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return false;
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CXFA_FFWidgetHandler* pWidgetHander = pXFADocView->GetWidgetHandler();
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std::unique_ptr<CXFA_WidgetAccIterator> pWidgetAccIterator(
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pXFADocView->CreateWidgetAccIterator());
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while (CXFA_WidgetAcc* pWidgetAcc = pWidgetAccIterator->MoveToNext()) {
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CXFA_EventParam preParam;
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preParam.m_eType = XFA_EVENT_PostSave;
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pWidgetHander->ProcessEvent(pWidgetAcc, &preParam);
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}
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pXFADocView->UpdateDocView();
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pDocument->_ClearChangeMark();
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return true;
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}
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bool SendPreSaveToXFADoc(CPDFXFA_Document* pDocument,
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std::vector<ScopedFileStream>* fileList) {
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if (pDocument->GetDocType() != DOCTYPE_DYNAMIC_XFA &&
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pDocument->GetDocType() != DOCTYPE_STATIC_XFA)
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return true;
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CXFA_FFDocView* pXFADocView = pDocument->GetXFADocView();
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if (!pXFADocView)
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return true;
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CXFA_FFWidgetHandler* pWidgetHander = pXFADocView->GetWidgetHandler();
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std::unique_ptr<CXFA_WidgetAccIterator> pWidgetAccIterator(
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pXFADocView->CreateWidgetAccIterator());
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while (CXFA_WidgetAcc* pWidgetAcc = pWidgetAccIterator->MoveToNext()) {
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CXFA_EventParam preParam;
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preParam.m_eType = XFA_EVENT_PreSave;
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pWidgetHander->ProcessEvent(pWidgetAcc, &preParam);
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}
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pXFADocView->UpdateDocView();
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return SaveXFADocumentData(pDocument, fileList);
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}
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#endif // PDF_ENABLE_XFA
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bool FPDF_Doc_Save(FPDF_DOCUMENT document,
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FPDF_FILEWRITE* pFileWrite,
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FPDF_DWORD flags,
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FPDF_BOOL bSetVersion,
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int fileVerion) {
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CPDF_Document* pPDFDoc = CPDFDocumentFromFPDFDocument(document);
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if (!pPDFDoc)
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return 0;
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#ifdef PDF_ENABLE_XFA
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CPDFXFA_Document* pDoc = static_cast<CPDFXFA_Document*>(document);
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std::vector<ScopedFileStream> fileList;
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SendPreSaveToXFADoc(pDoc, &fileList);
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#endif // PDF_ENABLE_XFA
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if (flags < FPDF_INCREMENTAL || flags > FPDF_REMOVE_SECURITY)
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flags = 0;
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CPDF_Creator FileMaker(pPDFDoc);
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if (bSetVersion)
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FileMaker.SetFileVersion(fileVerion);
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if (flags == FPDF_REMOVE_SECURITY) {
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flags = 0;
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FileMaker.RemoveSecurity();
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}
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CFX_IFileWrite* pStreamWrite = new CFX_IFileWrite;
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pStreamWrite->Init(pFileWrite);
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bool bRet = FileMaker.Create(pStreamWrite, flags);
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#ifdef PDF_ENABLE_XFA
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SendPostSaveToXFADoc(pDoc);
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#endif // PDF_ENABLE_XFA
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pStreamWrite->Release();
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return bRet;
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}
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} // namespace
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DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveAsCopy(FPDF_DOCUMENT document,
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FPDF_FILEWRITE* pFileWrite,
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FPDF_DWORD flags) {
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return FPDF_Doc_Save(document, pFileWrite, flags, FALSE, 0);
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}
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DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveWithVersion(FPDF_DOCUMENT document,
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FPDF_FILEWRITE* pFileWrite,
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FPDF_DWORD flags,
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int fileVersion) {
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return FPDF_Doc_Save(document, pFileWrite, flags, TRUE, fileVersion);
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}
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