| // 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 <memory> |
| #include <utility> |
| |
| #include "core/fpdfapi/parser/cpdf_data_avail.h" |
| #include "core/fpdfapi/parser/cpdf_document.h" |
| #include "core/fxcrt/cfx_retain_ptr.h" |
| #include "fpdfsdk/fsdk_define.h" |
| #include "public/fpdf_formfill.h" |
| #include "third_party/base/ptr_util.h" |
| |
| // These checks are here because core/ and public/ cannot depend on each other. |
| static_assert(CPDF_DataAvail::DataError == PDF_DATA_ERROR, |
| "CPDF_DataAvail::DataError value mismatch"); |
| static_assert(CPDF_DataAvail::DataNotAvailable == PDF_DATA_NOTAVAIL, |
| "CPDF_DataAvail::DataNotAvailable value mismatch"); |
| static_assert(CPDF_DataAvail::DataAvailable == PDF_DATA_AVAIL, |
| "CPDF_DataAvail::DataAvailable value mismatch"); |
| |
| static_assert(CPDF_DataAvail::LinearizationUnknown == PDF_LINEARIZATION_UNKNOWN, |
| "CPDF_DataAvail::LinearizationUnknown value mismatch"); |
| static_assert(CPDF_DataAvail::NotLinearized == PDF_NOT_LINEARIZED, |
| "CPDF_DataAvail::NotLinearized value mismatch"); |
| static_assert(CPDF_DataAvail::Linearized == PDF_LINEARIZED, |
| "CPDF_DataAvail::Linearized value mismatch"); |
| |
| static_assert(CPDF_DataAvail::FormError == PDF_FORM_ERROR, |
| "CPDF_DataAvail::FormError value mismatch"); |
| static_assert(CPDF_DataAvail::FormNotAvailable == PDF_FORM_NOTAVAIL, |
| "CPDF_DataAvail::FormNotAvailable value mismatch"); |
| static_assert(CPDF_DataAvail::FormAvailable == PDF_FORM_AVAIL, |
| "CPDF_DataAvail::FormAvailable value mismatch"); |
| static_assert(CPDF_DataAvail::FormNotExist == PDF_FORM_NOTEXIST, |
| "CPDF_DataAvail::FormNotExist value mismatch"); |
| |
| namespace { |
| |
| class CFPDF_FileAvailWrap : public CPDF_DataAvail::FileAvail { |
| public: |
| CFPDF_FileAvailWrap() : m_pfileAvail(nullptr) {} |
| ~CFPDF_FileAvailWrap() override {} |
| |
| void Set(FX_FILEAVAIL* pfileAvail) { m_pfileAvail = pfileAvail; } |
| |
| // CPDF_DataAvail::FileAvail: |
| bool IsDataAvail(FX_FILESIZE offset, uint32_t size) override { |
| return !!m_pfileAvail->IsDataAvail(m_pfileAvail, offset, size); |
| } |
| |
| private: |
| FX_FILEAVAIL* m_pfileAvail; |
| }; |
| |
| class CFPDF_FileAccessWrap : public IFX_SeekableReadStream { |
| public: |
| static CFX_RetainPtr<CFPDF_FileAccessWrap> Create() { |
| return CFX_RetainPtr<CFPDF_FileAccessWrap>(new CFPDF_FileAccessWrap()); |
| } |
| ~CFPDF_FileAccessWrap() override {} |
| |
| void Set(FPDF_FILEACCESS* pFile) { m_pFileAccess = pFile; } |
| |
| // IFX_SeekableReadStream |
| FX_FILESIZE GetSize() override { return m_pFileAccess->m_FileLen; } |
| |
| 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); |
| } |
| |
| private: |
| CFPDF_FileAccessWrap() : m_pFileAccess(nullptr) {} |
| |
| FPDF_FILEACCESS* m_pFileAccess; |
| }; |
| |
| class CFPDF_DownloadHintsWrap : public CPDF_DataAvail::DownloadHints { |
| public: |
| explicit CFPDF_DownloadHintsWrap(FX_DOWNLOADHINTS* pDownloadHints) { |
| m_pDownloadHints = pDownloadHints; |
| } |
| ~CFPDF_DownloadHintsWrap() override {} |
| |
| public: |
| // IFX_DownloadHints |
| void AddSegment(FX_FILESIZE offset, uint32_t size) override { |
| m_pDownloadHints->AddSegment(m_pDownloadHints, offset, size); |
| } |
| |
| private: |
| FX_DOWNLOADHINTS* m_pDownloadHints; |
| }; |
| |
| class CFPDF_DataAvail { |
| public: |
| CFPDF_DataAvail() |
| : m_FileAvail(new CFPDF_FileAvailWrap), |
| m_FileRead(CFPDF_FileAccessWrap::Create()) {} |
| ~CFPDF_DataAvail() {} |
| |
| std::unique_ptr<CPDF_DataAvail> m_pDataAvail; |
| std::unique_ptr<CFPDF_FileAvailWrap> m_FileAvail; |
| CFX_RetainPtr<CFPDF_FileAccessWrap> m_FileRead; |
| }; |
| |
| CFPDF_DataAvail* CFPDFDataAvailFromFPDFAvail(FPDF_AVAIL avail) { |
| return static_cast<CFPDF_DataAvail*>(avail); |
| } |
| |
| } // namespace |
| |
| 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 = pdfium::MakeUnique<CPDF_DataAvail>( |
| pAvail->m_FileAvail.get(), pAvail->m_FileRead, true); |
| 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 CFPDFDataAvailFromFPDFAvail(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; |
| |
| std::unique_ptr<CPDF_Parser> pParser(new CPDF_Parser); |
| pParser->SetPassword(password); |
| |
| std::unique_ptr<CPDF_Document> pDocument( |
| new CPDF_Document(std::move(pParser))); |
| CPDF_Parser::Error error = pDocument->GetParser()->StartLinearizedParse( |
| pDataAvail->m_pDataAvail->GetFileRead(), pDocument.get()); |
| if (error != CPDF_Parser::SUCCESS) { |
| ProcessParseError(error); |
| return nullptr; |
| } |
| pDataAvail->m_pDataAvail->SetDocument(pDocument.get()); |
| CheckUnSupportError(pDocument.get(), FPDF_ERR_SUCCESS); |
| return FPDFDocumentFromCPDFDocument(pDocument.release()); |
| } |
| |
| 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; |
| if (page_index < 0) |
| return PDF_DATA_NOTAVAIL; |
| CFPDF_DownloadHintsWrap hints_wrap(hints); |
| return CFPDFDataAvailFromFPDFAvail(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 CFPDFDataAvailFromFPDFAvail(avail)->m_pDataAvail->IsFormAvail( |
| &hints_wrap); |
| } |
| |
| DLLEXPORT int STDCALL FPDFAvail_IsLinearized(FPDF_AVAIL avail) { |
| if (!avail) |
| return PDF_LINEARIZATION_UNKNOWN; |
| return CFPDFDataAvailFromFPDFAvail(avail)->m_pDataAvail->IsLinearizedPDF(); |
| } |