| // 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/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, |
| const CPDF_LinearizedHeader* pLinearized); |
| |
| CPDF_HintTables(CPDF_ReadValidator* pValidator, |
| const 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<const CPDF_LinearizedHeader> const m_pLinearized; |
| |
| uint32_t m_nFirstPageSharedObjs = 0; |
| FX_FILESIZE m_szFirstPageObjOffset = 0; |
| std::vector<PageInfo> m_PageInfos; |
| std::vector<SharedObjGroupInfo> m_SharedObjGroupInfos; |
| }; |
| |
| #endif // CORE_FPDFAPI_PARSER_CPDF_HINT_TABLES_H_ |