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// Copyright 2016 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
#ifndef CORE_FPDFAPI_PARSER_CPDF_HINT_TABLES_H_
#define CORE_FPDFAPI_PARSER_CPDF_HINT_TABLES_H_
#include <memory>
#include <vector>
#include "core/fpdfapi/parser/cpdf_data_avail.h"
#include "core/fxcrt/fx_stream.h"
#include "core/fxcrt/unowned_ptr.h"
class CFX_BitStream;
class CPDF_LinearizedHeader;
class CPDF_ReadValidator;
class CPDF_Stream;
class CPDF_SyntaxParser;
class CPDF_HintTables {
public:
struct SharedObjGroupInfo {
FX_FILESIZE m_szOffset = 0;
uint32_t m_dwLength = 0;
uint32_t m_dwObjectsCount = 0;
uint32_t m_dwStartObjNum = 0;
};
class PageInfo {
public:
PageInfo();
~PageInfo();
void set_objects_count(uint32_t objects_count) {
m_dwObjectsCount = objects_count;
}
uint32_t objects_count() const { return m_dwObjectsCount; }
void set_page_offset(FX_FILESIZE offset) { m_szOffset = offset; }
FX_FILESIZE page_offset() const { return m_szOffset; }
void set_page_length(uint32_t length) { m_dwLength = length; }
uint32_t page_length() const { return m_dwLength; }
void set_start_obj_num(uint32_t start_obj_num) {
m_dwStartObjNum = start_obj_num;
}
uint32_t start_obj_num() const { return m_dwStartObjNum; }
void AddIdentifier(uint32_t Identifier) {
m_dwIdentifierArray.push_back(Identifier);
}
const std::vector<uint32_t>& Identifiers() const {
return m_dwIdentifierArray;
}
private:
uint32_t m_dwObjectsCount = 0;
FX_FILESIZE m_szOffset = 0;
uint32_t m_dwLength = 0;
uint32_t m_dwStartObjNum = 0;
std::vector<uint32_t> m_dwIdentifierArray;
PageInfo(const PageInfo& other) = delete;
PageInfo& operator=(const PageInfo&) = delete;
};
static std::unique_ptr<CPDF_HintTables> Parse(
CPDF_SyntaxParser* parser,
CPDF_LinearizedHeader* pLinearized);
CPDF_HintTables(CPDF_ReadValidator* pValidator,
CPDF_LinearizedHeader* pLinearized);
virtual ~CPDF_HintTables();
bool GetPagePos(uint32_t index,
FX_FILESIZE* szPageStartPos,
FX_FILESIZE* szPageLength,
uint32_t* dwObjNum) const;
CPDF_DataAvail::DocAvailStatus CheckPage(uint32_t index);
bool LoadHintStream(CPDF_Stream* pHintStream);
const std::vector<PageInfo>& PageInfos() const { return m_PageInfos; }
const std::vector<SharedObjGroupInfo>& SharedGroupInfos() const {
return m_SharedObjGroupInfos;
}
FX_FILESIZE GetFirstPageObjOffset() const { return m_szFirstPageObjOffset; }
protected:
bool ReadPageHintTable(CFX_BitStream* hStream);
bool ReadSharedObjHintTable(CFX_BitStream* hStream, uint32_t offset);
private:
FX_FILESIZE HintsOffsetToFileOffset(uint32_t hints_offset) const;
// Owned by |m_pDataAvail|.
UnownedPtr<CPDF_ReadValidator> m_pValidator;
// Owned by |m_pDataAvail|.
UnownedPtr<CPDF_LinearizedHeader> const m_pLinearized;
uint32_t m_nFirstPageSharedObjs;
FX_FILESIZE m_szFirstPageObjOffset;
std::vector<PageInfo> m_PageInfos;
std::vector<SharedObjGroupInfo> m_SharedObjGroupInfos;
};
#endif // CORE_FPDFAPI_PARSER_CPDF_HINT_TABLES_H_
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