1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
// 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_DATA_AVAIL_H_
#define CORE_FPDFAPI_PARSER_CPDF_DATA_AVAIL_H_
#include <map>
#include <memory>
#include <set>
#include <utility>
#include <vector>
#include "core/fpdfapi/parser/cpdf_parser.h"
#include "core/fpdfapi/parser/cpdf_syntax_parser.h"
#include "core/fxcrt/unowned_ptr.h"
class CPDF_CrossRefAvail;
class CPDF_Dictionary;
class CPDF_HintTables;
class CPDF_IndirectObjectHolder;
class CPDF_LinearizedHeader;
class CPDF_PageObjectAvail;
class CPDF_Parser;
class CPDF_ReadValidator;
enum PDF_DATAAVAIL_STATUS {
PDF_DATAAVAIL_HEADER = 0,
PDF_DATAAVAIL_FIRSTPAGE,
PDF_DATAAVAIL_HINTTABLE,
PDF_DATAAVAIL_LOADALLCROSSREF,
PDF_DATAAVAIL_ROOT,
PDF_DATAAVAIL_INFO,
PDF_DATAAVAIL_PAGETREE,
PDF_DATAAVAIL_PAGE,
PDF_DATAAVAIL_PAGE_LATERLOAD,
PDF_DATAAVAIL_RESOURCES,
PDF_DATAAVAIL_DONE,
PDF_DATAAVAIL_ERROR,
PDF_DATAAVAIL_LOADALLFILE,
};
enum PDF_PAGENODE_TYPE {
PDF_PAGENODE_UNKNOWN = 0,
PDF_PAGENODE_PAGE,
PDF_PAGENODE_PAGES,
PDF_PAGENODE_ARRAY,
};
class CPDF_DataAvail final {
public:
// Must match PDF_DATA_* definitions in public/fpdf_dataavail.h, but cannot
// #include that header. fpdfsdk/fpdf_dataavail.cpp has static_asserts
// to make sure the two sets of values match.
enum DocAvailStatus {
DataError = -1, // PDF_DATA_ERROR
DataNotAvailable = 0, // PDF_DATA_NOTAVAIL
DataAvailable = 1, // PDF_DATA_AVAIL
};
// Must match PDF_*LINEAR* definitions in public/fpdf_dataavail.h, but cannot
// #include that header. fpdfsdk/fpdf_dataavail.cpp has static_asserts
// to make sure the two sets of values match.
enum DocLinearizationStatus {
LinearizationUnknown = -1, // PDF_LINEARIZATION_UNKNOWN
NotLinearized = 0, // PDF_NOT_LINEARIZED
Linearized = 1, // PDF_LINEARIZED
};
// Must match PDF_FORM_* definitions in public/fpdf_dataavail.h, but cannot
// #include that header. fpdfsdk/fpdf_dataavail.cpp has static_asserts
// to make sure the two sets of values match.
enum DocFormStatus {
FormError = -1, // PDF_FORM_ERROR
FormNotAvailable = 0, // PDF_FORM_NOTAVAIL
FormAvailable = 1, // PDF_FORM_AVAIL
FormNotExist = 2, // PDF_FORM_NOTEXIST
};
class FileAvail {
public:
virtual ~FileAvail();
virtual bool IsDataAvail(FX_FILESIZE offset, size_t size) = 0;
};
class DownloadHints {
public:
virtual ~DownloadHints();
virtual void AddSegment(FX_FILESIZE offset, size_t size) = 0;
};
CPDF_DataAvail(FileAvail* pFileAvail,
const RetainPtr<IFX_SeekableReadStream>& pFileRead,
bool bSupportHintTable);
~CPDF_DataAvail();
DocAvailStatus IsDocAvail(DownloadHints* pHints);
DocAvailStatus IsPageAvail(uint32_t dwPage, DownloadHints* pHints);
DocFormStatus IsFormAvail(DownloadHints* pHints);
DocLinearizationStatus IsLinearizedPDF();
RetainPtr<IFX_SeekableReadStream> GetFileRead() const;
int GetPageCount() const;
CPDF_Dictionary* GetPage(int index);
RetainPtr<CPDF_ReadValidator> GetValidator() const;
std::pair<CPDF_Parser::Error, std::unique_ptr<CPDF_Document>> ParseDocument(
const char* password);
const CPDF_HintTables* GetHintTables() const { return m_pHintTables.get(); }
protected:
class PageNode {
public:
PageNode();
~PageNode();
PDF_PAGENODE_TYPE m_type;
uint32_t m_dwPageNo;
std::vector<std::unique_ptr<PageNode>> m_ChildNodes;
};
static const int kMaxPageRecursionDepth = 1024;
bool CheckDocStatus();
bool CheckHeader();
bool CheckFirstPage();
bool CheckHintTables();
bool CheckRoot();
bool CheckInfo();
bool CheckPages();
bool CheckPage();
DocAvailStatus CheckResources(const CPDF_Dictionary* page);
DocFormStatus CheckAcroForm();
bool CheckPageStatus();
DocAvailStatus CheckHeaderAndLinearized();
std::unique_ptr<CPDF_Object> ParseIndirectObjectAt(
FX_FILESIZE pos,
uint32_t objnum,
CPDF_IndirectObjectHolder* pObjList = nullptr);
std::unique_ptr<CPDF_Object> GetObject(uint32_t objnum,
bool* pExistInFile);
bool GetPageKids(CPDF_Parser* pParser, CPDF_Object* pPages);
bool PreparePageItem();
bool LoadPages();
bool CheckAndLoadAllXref();
bool LoadAllFile();
DocAvailStatus CheckLinearizedData();
bool CheckPage(uint32_t dwPage);
bool LoadDocPages();
bool LoadDocPage(uint32_t dwPage);
bool CheckPageNode(const PageNode& pageNode,
int32_t iPage,
int32_t& iCount,
int level);
bool CheckUnknownPageNode(uint32_t dwPageNo, PageNode* pPageNode);
bool CheckArrayPageNode(uint32_t dwPageNo, PageNode* pPageNode);
bool CheckPageCount();
bool IsFirstCheck(uint32_t dwPage);
void ResetFirstCheck(uint32_t dwPage);
bool ValidatePage(uint32_t dwPage);
CPDF_SyntaxParser* GetSyntaxParser() const;
FileAvail* const m_pFileAvail;
RetainPtr<CPDF_ReadValidator> m_pFileRead;
CPDF_Parser m_parser;
std::unique_ptr<CPDF_Object> m_pRoot;
uint32_t m_dwRootObjNum = 0;
uint32_t m_dwInfoObjNum = 0;
std::unique_ptr<CPDF_LinearizedHeader> m_pLinearized;
bool m_bDocAvail = false;
std::unique_ptr<CPDF_CrossRefAvail> m_pCrossRefAvail;
PDF_DATAAVAIL_STATUS m_docStatus = PDF_DATAAVAIL_HEADER;
const FX_FILESIZE m_dwFileLen;
CPDF_Document* m_pDocument = nullptr;
std::vector<uint32_t> m_PageObjList;
uint32_t m_PagesObjNum = 0;
bool m_bLinearedDataOK = false;
bool m_bMainXRefLoadTried = false;
bool m_bMainXRefLoadedOK = false;
bool m_bPagesTreeLoad = false;
bool m_bPagesLoad = false;
CPDF_Parser* m_pCurrentParser = nullptr;
std::unique_ptr<CPDF_PageObjectAvail> m_pFormAvail;
std::vector<std::unique_ptr<CPDF_Object>> m_PagesArray;
uint32_t m_dwEncryptObjNum = 0;
bool m_bTotalLoadPageTree = false;
bool m_bCurPageDictLoadOK = false;
PageNode m_PageNode;
std::set<uint32_t> m_pageMapCheckState;
std::set<uint32_t> m_pagesLoadState;
std::set<uint32_t> m_SeenPrevPositions;
std::unique_ptr<CPDF_HintTables> m_pHintTables;
const bool m_bSupportHintTable;
std::map<uint32_t, std::unique_ptr<CPDF_PageObjectAvail>> m_PagesObjAvail;
std::map<const CPDF_Object*, std::unique_ptr<CPDF_PageObjectAvail>>
m_PagesResourcesAvail;
bool m_bHeaderAvail = false;
};
#endif // CORE_FPDFAPI_PARSER_CPDF_DATA_AVAIL_H_
|
