// 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_dataavail.h" #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h" #include "core/fpdfapi/fpdf_parser/include/ipdf_data_avail.h" #include "fpdfsdk/include/fsdk_define.h" #include "public/fpdf_formfill.h" // These checks are here because core/ and public/ cannot depend on each other. static_assert(IPDF_DataAvail::DataError == PDF_DATA_ERROR, "IPDF_DataAvail::DataError value mismatch"); static_assert(IPDF_DataAvail::DataNotAvailable == PDF_DATA_NOTAVAIL, "IPDF_DataAvail::DataNotAvailable value mismatch"); static_assert(IPDF_DataAvail::DataAvailable == PDF_DATA_AVAIL, "IPDF_DataAvail::DataAvailable value mismatch"); static_assert(IPDF_DataAvail::LinearizationUnknown == PDF_LINEARIZATION_UNKNOWN, "IPDF_DataAvail::LinearizationUnknown value mismatch"); static_assert(IPDF_DataAvail::NotLinearized == PDF_NOT_LINEARIZED, "IPDF_DataAvail::NotLinearized value mismatch"); static_assert(IPDF_DataAvail::Linearized == PDF_LINEARIZED, "IPDF_DataAvail::Linearized value mismatch"); static_assert(IPDF_DataAvail::FormError == PDF_FORM_ERROR, "IPDF_DataAvail::FormError value mismatch"); static_assert(IPDF_DataAvail::FormNotAvailable == PDF_FORM_NOTAVAIL, "IPDF_DataAvail::FormNotAvailable value mismatch"); static_assert(IPDF_DataAvail::FormAvailable == PDF_FORM_AVAIL, "IPDF_DataAvail::FormAvailable value mismatch"); static_assert(IPDF_DataAvail::FormNotExist == PDF_FORM_NOTEXIST, "IPDF_DataAvail::FormNotExist value mismatch"); class CFPDF_FileAvailWrap : public IPDF_DataAvail::FileAvail { public: CFPDF_FileAvailWrap() { m_pfileAvail = NULL; } ~CFPDF_FileAvailWrap() override {} void Set(FX_FILEAVAIL* pfileAvail) { m_pfileAvail = pfileAvail; } // IPDF_DataAvail::FileAvail: FX_BOOL IsDataAvail(FX_FILESIZE offset, FX_DWORD size) override { return m_pfileAvail->IsDataAvail(m_pfileAvail, offset, size); } private: FX_FILEAVAIL* m_pfileAvail; }; class CFPDF_FileAccessWrap : public IFX_FileRead { public: CFPDF_FileAccessWrap() { m_pFileAccess = NULL; } ~CFPDF_FileAccessWrap() override {} void Set(FPDF_FILEACCESS* pFile) { m_pFileAccess = pFile; } // IFX_FileRead FX_FILESIZE GetSize() override { return m_pFileAccess->m_FileLen; } FX_BOOL ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override { return m_pFileAccess->m_GetBlock(m_pFileAccess->m_Param, offset, (uint8_t*)buffer, size); } void Release() override {} private: FPDF_FILEACCESS* m_pFileAccess; }; class CFPDF_DownloadHintsWrap : public IPDF_DataAvail::DownloadHints { public: explicit CFPDF_DownloadHintsWrap(FX_DOWNLOADHINTS* pDownloadHints) { m_pDownloadHints = pDownloadHints; } ~CFPDF_DownloadHintsWrap() override {} public: // IFX_DownloadHints void AddSegment(FX_FILESIZE offset, FX_DWORD size) override { m_pDownloadHints->AddSegment(m_pDownloadHints, offset, size); } private: FX_DOWNLOADHINTS* m_pDownloadHints; }; class CFPDF_DataAvail { public: CFPDF_DataAvail() { m_pDataAvail = NULL; } ~CFPDF_DataAvail() { delete m_pDataAvail; } IPDF_DataAvail* m_pDataAvail; CFPDF_FileAvailWrap m_FileAvail; CFPDF_FileAccessWrap m_FileRead; }; DLLEXPORT FPDF_AVAIL STDCALL FPDFAvail_Create(FX_FILEAVAIL* file_avail, FPDF_FILEACCESS* file) { CFPDF_DataAvail* pAvail = new CFPDF_DataAvail; pAvail->m_FileAvail.Set(file_avail); pAvail->m_FileRead.Set(file); pAvail->m_pDataAvail = IPDF_DataAvail::Create(&pAvail->m_FileAvail, &pAvail->m_FileRead); return pAvail; } DLLEXPORT void STDCALL FPDFAvail_Destroy(FPDF_AVAIL avail) { delete (CFPDF_DataAvail*)avail; } DLLEXPORT int STDCALL FPDFAvail_IsDocAvail(FPDF_AVAIL avail, FX_DOWNLOADHINTS* hints) { if (!avail || !hints) return PDF_DATA_ERROR; CFPDF_DownloadHintsWrap hints_wrap(hints); return ((CFPDF_DataAvail*)avail)->m_pDataAvail->IsDocAvail(&hints_wrap); } DLLEXPORT FPDF_DOCUMENT STDCALL FPDFAvail_GetDocument(FPDF_AVAIL avail, FPDF_BYTESTRING password) { CFPDF_DataAvail* pDataAvail = static_cast<CFPDF_DataAvail*>(avail); if (!pDataAvail) return nullptr; CPDF_Parser* pParser = new CPDF_Parser; pParser->SetPassword(password); CPDF_Parser::Error error = pParser->StartAsyncParse(pDataAvail->m_pDataAvail->GetFileRead()); if (error != CPDF_Parser::SUCCESS) { delete pParser; ProcessParseError(error); return nullptr; } pDataAvail->m_pDataAvail->SetDocument(pParser->GetDocument()); CheckUnSupportError(pParser->GetDocument(), FPDF_ERR_SUCCESS); return FPDFDocumentFromCPDFDocument(pParser->GetDocument()); } DLLEXPORT int STDCALL FPDFAvail_GetFirstPageNum(FPDF_DOCUMENT doc) { CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc); return pDoc ? pDoc->GetParser()->GetFirstPageNo() : 0; } DLLEXPORT int STDCALL FPDFAvail_IsPageAvail(FPDF_AVAIL avail, int page_index, FX_DOWNLOADHINTS* hints) { if (!avail || !hints) return PDF_DATA_ERROR; CFPDF_DownloadHintsWrap hints_wrap(hints); return ((CFPDF_DataAvail*)avail) ->m_pDataAvail->IsPageAvail(page_index, &hints_wrap); } DLLEXPORT int STDCALL FPDFAvail_IsFormAvail(FPDF_AVAIL avail, FX_DOWNLOADHINTS* hints) { if (!avail || !hints) return PDF_FORM_ERROR; CFPDF_DownloadHintsWrap hints_wrap(hints); return ((CFPDF_DataAvail*)avail)->m_pDataAvail->IsFormAvail(&hints_wrap); } DLLEXPORT int STDCALL FPDFAvail_IsLinearized(FPDF_AVAIL avail) { if (!avail) return PDF_LINEARIZATION_UNKNOWN; return ((CFPDF_DataAvail*)avail)->m_pDataAvail->IsLinearizedPDF(); }