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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_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 "core/fxcrt/fx_stream.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:
template <typename T, typename... Args>
friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
~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(pdfium::MakeUnique<CFPDF_FileAvailWrap>()),
m_FileRead(pdfium::MakeRetain<CFPDF_FileAccessWrap>()) {}
~CFPDF_DataAvail() {}
std::unique_ptr<CFPDF_FileAvailWrap> m_FileAvail;
CFX_RetainPtr<CFPDF_FileAccessWrap> m_FileRead;
std::unique_ptr<CPDF_DataAvail> m_pDataAvail;
};
CFPDF_DataAvail* CFPDFDataAvailFromFPDFAvail(FPDF_AVAIL avail) {
return static_cast<CFPDF_DataAvail*>(avail);
}
} // namespace
FPDF_EXPORT FPDF_AVAIL FPDF_CALLCONV FPDFAvail_Create(FX_FILEAVAIL* file_avail,
FPDF_FILEACCESS* file) {
auto pAvail = pdfium::MakeUnique<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.release(); // Caller takes ownership.
}
FPDF_EXPORT void FPDF_CALLCONV FPDFAvail_Destroy(FPDF_AVAIL avail) {
// Take ownership back from caller and destroy.
std::unique_ptr<CFPDF_DataAvail>(static_cast<CFPDF_DataAvail*>(avail));
}
FPDF_EXPORT int FPDF_CALLCONV 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);
}
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDFAvail_GetDocument(FPDF_AVAIL avail, FPDF_BYTESTRING password) {
CFPDF_DataAvail* pDataAvail = static_cast<CFPDF_DataAvail*>(avail);
if (!pDataAvail)
return nullptr;
auto pParser = pdfium::MakeUnique<CPDF_Parser>();
pParser->SetPassword(password);
auto pDocument = pdfium::MakeUnique<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());
}
FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_GetFirstPageNum(FPDF_DOCUMENT doc) {
CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(doc);
return pDoc ? pDoc->GetParser()->GetFirstPageNo() : 0;
}
FPDF_EXPORT int FPDF_CALLCONV 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);
}
FPDF_EXPORT int FPDF_CALLCONV 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);
}
FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsLinearized(FPDF_AVAIL avail) {
if (!avail)
return PDF_LINEARIZATION_UNKNOWN;
return CFPDFDataAvailFromFPDFAvail(avail)->m_pDataAvail->IsLinearizedPDF();
}
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