7#include "public/fpdf_dataavail.h"
12#include "core/fpdfapi/page/cpdf_docpagedata.h"
13#include "core/fpdfapi/parser/cpdf_data_avail.h"
14#include "core/fpdfapi/parser/cpdf_document.h"
15#include "core/fpdfapi/render/cpdf_docrenderdata.h"
16#include "core/fxcrt/fx_safe_types.h"
17#include "core/fxcrt/fx_stream.h"
18#include "core/fxcrt/retain_ptr.h"
19#include "core/fxcrt/unowned_ptr.h"
20#include "core/fxcrt/unowned_ptr_exclusion.h"
21#include "fpdfsdk/cpdfsdk_helpers.h"
22#include "public/fpdf_formfill.h"
23#include "third_party/base/numerics/safe_conversions.h"
26#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
31 "CPDF_DataAvail::kDataError value mismatch");
33 "CPDF_DataAvail::kDataNotAvailable value mismatch");
35 "CPDF_DataAvail::kDataAvailable value mismatch");
39 "CPDF_DataAvail::kLinearizationUnknown value mismatch");
41 "CPDF_DataAvail::kNotLinearized value mismatch");
43 "CPDF_DataAvail::kLinearized value mismatch");
46 "CPDF_DataAvail::kFormError value mismatch");
48 "CPDF_DataAvail::kFormNotAvailable value mismatch");
50 "CPDF_DataAvail::kFormAvailable value mismatch");
52 "CPDF_DataAvail::kFormNotExist value mismatch");
56class FPDF_FileAvailContext
final :
public CPDF_DataAvail::
FileAvail {
58 explicit FPDF_FileAvailContext(FX_FILEAVAIL* avail) : avail_(avail) {}
59 ~FPDF_FileAvailContext()
override =
default;
62 bool IsDataAvail(
FX_FILESIZE offset, size_t size)
override {
63 return !!avail_->IsDataAvail(
64 avail_, pdfium::base::checked_cast<size_t>(offset), size);
77 FX_FILESIZE GetSize()
override {
return file_->m_FileLen; }
79 bool ReadBlockAtOffset(pdfium::span<uint8_t> buffer,
81 if (buffer.empty() || offset < 0)
84 if (!pdfium::base::IsValueInRangeForNumericType<
FX_FILESIZE>(buffer.size()))
87 FX_SAFE_FILESIZE new_pos = buffer.size();
89 return new_pos.IsValid() && new_pos.ValueOrDie() <= GetSize() &&
92 pdfium::base::checked_cast<
unsigned long>(offset), buffer.data(),
93 pdfium::base::checked_cast<
unsigned long>(buffer.size()));
97 explicit FPDF_FileAccessContext(FPDF_FILEACCESS* file) : file_(file) {}
98 ~FPDF_FileAccessContext()
override =
default;
104class FPDF_DownloadHintsContext
final :
public CPDF_DataAvail::
DownloadHints {
106 explicit FPDF_DownloadHintsContext(FX_DOWNLOADHINTS* pDownloadHints)
107 : m_pDownloadHints(pDownloadHints) {}
108 ~FPDF_DownloadHintsContext()
override =
default;
111 void AddSegment(
FX_FILESIZE offset, size_t size)
override {
112 if (m_pDownloadHints) {
113 m_pDownloadHints->AddSegment(m_pDownloadHints,
114 static_cast<size_t>(offset), size);
119 UnownedPtr<FX_DOWNLOADHINTS> m_pDownloadHints;
122class FPDF_AvailContext {
124 FPDF_AvailContext(FX_FILEAVAIL* file_avail, FPDF_FILEACCESS* file)
125 : file_avail_(std::make_unique<FPDF_FileAvailContext>(file_avail)),
126 file_read_(pdfium::MakeRetain<FPDF_FileAccessContext>(file)),
128 std::make_unique<CPDF_DataAvail>(file_avail_.get(), file_read_)) {}
129 ~FPDF_AvailContext() =
default;
131 CPDF_DataAvail* data_avail() {
return data_avail_.get(); }
134 std::unique_ptr<FPDF_FileAvailContext>
const file_avail_;
135 RetainPtr<FPDF_FileAccessContext>
const file_read_;
136 std::unique_ptr<CPDF_DataAvail>
const data_avail_;
139FPDF_AvailContext* FPDFAvailContextFromFPDFAvail(FPDF_AVAIL avail) {
140 return reinterpret_cast<FPDF_AvailContext*>(avail);
143FPDF_AVAIL FPDFAvailFromFPDFAvailContext(FPDF_AvailContext* pAvailContext) {
144 return reinterpret_cast<FPDF_AVAIL>(pAvailContext);
150 FPDF_FILEACCESS* file) {
151 auto pAvail =
std::make_unique<FPDF_AvailContext>(file_avail, file);
154 return FPDFAvailFromFPDFAvailContext(pAvail.release());
159 std::unique_ptr<FPDF_AvailContext>(FPDFAvailContextFromFPDFAvail(avail));
163 FX_DOWNLOADHINTS* hints) {
164 auto* avail_context = FPDFAvailContextFromFPDFAvail(avail);
167 FPDF_DownloadHintsContext hints_context(hints);
168 return avail_context->data_avail()
->IsDocAvail(&hints_context);
173 auto* avail_context = FPDFAvailContextFromFPDFAvail(avail);
177 std::unique_ptr<CPDF_Document> document;
178 std::tie(error, document) = avail_context->data_avail()->ParseDocument(
180 std::make_unique<CPDF_DocPageData>(), password);
186 ReportUnsupportedFeatures(document.get());
187 return FPDFDocumentFromCPDFDocument(document.release());
197 FX_DOWNLOADHINTS* hints) {
198 auto* avail_context = FPDFAvailContextFromFPDFAvail(avail);
203 FPDF_DownloadHintsContext hints_context(hints);
204 return avail_context->data_avail()
->IsPageAvail(page_index, &hints_context);
208 FX_DOWNLOADHINTS* hints) {
209 auto* avail_context = FPDFAvailContextFromFPDFAvail(avail);
212 FPDF_DownloadHintsContext hints_context(hints);
213 return avail_context->data_avail()
->IsFormAvail(&hints_context);
217 auto* avail_context = FPDFAvailContextFromFPDFAvail(avail);
DocAvailStatus IsPageAvail(uint32_t dwPage, DownloadHints *pHints)
DocAvailStatus IsDocAvail(DownloadHints *pHints)
DocLinearizationStatus IsLinearizedPDF()
DocFormStatus IsFormAvail(DownloadHints *pHints)
CPDF_Parser * GetParser() const
uint32_t GetFirstPageNo() const
void ProcessParseError(CPDF_Parser::Error err)
CPDF_Document * CPDFDocumentFromFPDFDocument(FPDF_DOCUMENT doc)
#define PDF_FORM_NOTEXIST
#define PDF_FORM_NOTAVAIL
#define PDF_DATA_NOTAVAIL
#define PDF_LINEARIZATION_UNKNOWN
FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsFormAvail(FPDF_AVAIL avail, FX_DOWNLOADHINTS *hints)
FPDF_EXPORT void FPDF_CALLCONV FPDFAvail_Destroy(FPDF_AVAIL avail)
FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsPageAvail(FPDF_AVAIL avail, int page_index, FX_DOWNLOADHINTS *hints)
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV FPDFAvail_GetDocument(FPDF_AVAIL avail, FPDF_BYTESTRING password)
#define PDF_NOT_LINEARIZED
FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsDocAvail(FPDF_AVAIL avail, FX_DOWNLOADHINTS *hints)
FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_GetFirstPageNum(FPDF_DOCUMENT doc)
FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsLinearized(FPDF_AVAIL avail)
FPDF_EXPORT FPDF_AVAIL FPDF_CALLCONV FPDFAvail_Create(FX_FILEAVAIL *file_avail, FPDF_FILEACCESS *file)
#define CONSTRUCT_VIA_MAKE_RETAIN
#define UNOWNED_PTR_EXCLUSION