summaryrefslogtreecommitdiff
path: root/core/include/fpdfapi/fpdf_parser.h
blob: 32509eb837a7766cbab2248e9a77bd2b5093c146 (plain)
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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
// 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

#ifndef CORE_INCLUDE_FPDFAPI_FPDF_PARSER_H_
#define CORE_INCLUDE_FPDFAPI_FPDF_PARSER_H_

#include "../../../third_party/base/nonstd_unique_ptr.h"
#include "../fxcrt/fx_system.h"
#include "fpdf_objects.h"

class CPDF_Document;
class CPDF_Parser;
class CPDF_SecurityHandler;
class CPDF_StandardSecurityHandler;
class CPDF_CryptoHandler;
class CPDF_Object;
class IFX_FileRead;
class CFDF_Document;
class CFDF_Parser;
class CFX_Font;
class CFX_AffineMatrix;
class CFX_FloatRect;
class CPDF_Point;
class CPDF_DocPageData;
class CPDF_DocRenderData;
class CPDF_ModuleMgr;
class CFX_DIBSource;
class CPDF_Font;
class CPDF_Image;
class CPDF_ColorSpace;
class CPDF_Pattern;
class CPDF_FontEncoding;
class CPDF_IccProfile;
class CFX_PrivateData;
#define FPDFPERM_PRINT 0x0004
#define FPDFPERM_MODIFY 0x0008
#define FPDFPERM_EXTRACT 0x0010
#define FPDFPERM_ANNOT_FORM 0x0020
#define FPDFPERM_FILL_FORM 0x0100
#define FPDFPERM_EXTRACT_ACCESS 0x0200
#define FPDFPERM_ASSEMBLE 0x0400
#define FPDFPERM_PRINT_HIGH 0x0800
#define FPDF_PAGE_MAX_NUM 0xFFFFF

// Use the accessors below instead of directly accessing PDF_CharType.
extern const char PDF_CharType[256];

inline bool PDFCharIsWhitespace(uint8_t c) {
  return PDF_CharType[c] == 'W';
}
inline bool PDFCharIsNumeric(uint8_t c) {
  return PDF_CharType[c] == 'N';
}
inline bool PDFCharIsDelimiter(uint8_t c) {
  return PDF_CharType[c] == 'D';
}
inline bool PDFCharIsOther(uint8_t c) {
  return PDF_CharType[c] == 'R';
}

inline bool PDFCharIsLineEnding(uint8_t c) {
  return c == '\r' || c == '\n';
}

// Indexed by 8-bit char code, contains unicode code points.
extern const FX_WORD PDFDocEncoding[256];

class CPDF_Document : public CFX_PrivateData, public CPDF_IndirectObjects {
 public:
  CPDF_Document();
  explicit CPDF_Document(CPDF_Parser* pParser);

  ~CPDF_Document();

  CPDF_Parser* GetParser() const { return m_pParser; }

  CPDF_Dictionary* GetRoot() const { return m_pRootDict; }

  CPDF_Dictionary* GetInfo() const { return m_pInfoDict; }

  void GetID(CFX_ByteString& id1, CFX_ByteString& id2) const {
    id1 = m_ID1;
    id2 = m_ID2;
  }

  int GetPageCount() const;

  CPDF_Dictionary* GetPage(int iPage);

  int GetPageIndex(FX_DWORD objnum);

  FX_DWORD GetUserPermissions(FX_BOOL bCheckRevision = FALSE) const;

  FX_BOOL IsOwner() const;

  CPDF_DocPageData* GetPageData() { return GetValidatePageData(); }

  void ClearPageData();

  void RemoveColorSpaceFromPageData(CPDF_Object* pObject);

  CPDF_DocRenderData* GetRenderData() { return GetValidateRenderData(); }

  void ClearRenderData();

  void ClearRenderFont();

  FX_BOOL IsFormStream(FX_DWORD objnum, FX_BOOL& bForm) const;

  // |pFontDict| must not be null.
  CPDF_Font* LoadFont(CPDF_Dictionary* pFontDict);

  CPDF_ColorSpace* LoadColorSpace(CPDF_Object* pCSObj,
                                  CPDF_Dictionary* pResources = NULL);

  CPDF_Pattern* LoadPattern(CPDF_Object* pObj,
                            FX_BOOL bShading,
                            const CFX_AffineMatrix* matrix = NULL);

  CPDF_Image* LoadImageF(CPDF_Object* pObj);

  CPDF_StreamAcc* LoadFontFile(CPDF_Stream* pStream);

  CPDF_IccProfile* LoadIccProfile(CPDF_Stream* pStream);

#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_

  CPDF_Font* AddWindowsFont(LOGFONTA* pLogFont,
                            FX_BOOL bVert,
                            FX_BOOL bTranslateName = FALSE);
  CPDF_Font* AddWindowsFont(LOGFONTW* pLogFont,
                            FX_BOOL bVert,
                            FX_BOOL bTranslateName = FALSE);
#endif
#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
  CPDF_Font* AddMacFont(CTFontRef pFont,
                        FX_BOOL bVert,
                        FX_BOOL bTranslateName = FALSE);
#endif

  CPDF_Font* AddStandardFont(const FX_CHAR* font, CPDF_FontEncoding* pEncoding);

  CPDF_Font* AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert);

  void CreateNewDoc();

  CPDF_Dictionary* CreateNewPage(int iPage);

  void DeletePage(int iPage);

  void LoadDoc();
  void LoadAsynDoc(CPDF_Dictionary* pLinearized);
  void LoadPages();

 protected:
  CPDF_Dictionary* m_pRootDict;

  CPDF_Dictionary* m_pInfoDict;

  CFX_ByteString m_ID1;

  CFX_ByteString m_ID2;

  FX_BOOL m_bLinearized;

  FX_DWORD m_dwFirstPageNo;

  FX_DWORD m_dwFirstPageObjNum;

  CFX_DWordArray m_PageList;

  int _GetPageCount() const;
  CPDF_Dictionary* _FindPDFPage(CPDF_Dictionary* pPages,
                                int iPage,
                                int nPagesToGo,
                                int level);
  int _FindPageIndex(CPDF_Dictionary* pNode,
                     FX_DWORD& skip_count,
                     FX_DWORD objnum,
                     int& index,
                     int level = 0);
  FX_BOOL IsContentUsedElsewhere(FX_DWORD objnum, CPDF_Dictionary* pPageDict);
  FX_BOOL CheckOCGVisible(CPDF_Dictionary* pOCG, FX_BOOL bPrinting);
  CPDF_DocPageData* GetValidatePageData();
  CPDF_DocRenderData* GetValidateRenderData();
  friend class CPDF_Creator;
  friend class CPDF_Parser;
  friend class CPDF_DataAvail;
  friend class CPDF_OCContext;

  CPDF_DocPageData* m_pDocPage;

  CPDF_DocRenderData* m_pDocRender;
};

#define PDFWORD_EOF 0
#define PDFWORD_NUMBER 1
#define PDFWORD_TEXT 2
#define PDFWORD_DELIMITER 3
#define PDFWORD_NAME 4
class CPDF_SimpleParser {
 public:
  CPDF_SimpleParser(const uint8_t* pData, FX_DWORD dwSize);

  CPDF_SimpleParser(const CFX_ByteStringC& str);

  CFX_ByteStringC GetWord();

  FX_BOOL SearchToken(const CFX_ByteStringC& token);

  FX_BOOL SkipWord(const CFX_ByteStringC& token);

  FX_BOOL FindTagPair(const CFX_ByteStringC& start_token,
                      const CFX_ByteStringC& end_token,
                      FX_DWORD& start_pos,
                      FX_DWORD& end_pos);

  FX_BOOL FindTagParam(const CFX_ByteStringC& token, int nParams);

  FX_DWORD GetPos() { return m_dwCurPos; }

  void SetPos(FX_DWORD pos) {
    ASSERT(pos <= m_dwSize);
    m_dwCurPos = pos;
  }

 private:
  void ParseWord(const uint8_t*& pStart, FX_DWORD& dwSize, int& type);

  const uint8_t* m_pData;

  FX_DWORD m_dwSize;

  FX_DWORD m_dwCurPos;
};
class CPDF_SyntaxParser {
 public:
  CPDF_SyntaxParser();
  virtual ~CPDF_SyntaxParser();

  void InitParser(IFX_FileRead* pFileAccess, FX_DWORD HeaderOffset);

  FX_FILESIZE SavePos() { return m_Pos; }

  void RestorePos(FX_FILESIZE pos) { m_Pos = pos; }

  CPDF_Object* GetObject(CPDF_IndirectObjects* pObjList,
                         FX_DWORD objnum,
                         FX_DWORD gennum,
                         struct PARSE_CONTEXT* pContext = NULL,
                         FX_BOOL bDecrypt = TRUE);

  CPDF_Object* GetObjectByStrict(CPDF_IndirectObjects* pObjList,
                                 FX_DWORD objnum,
                                 FX_DWORD gennum,
                                 struct PARSE_CONTEXT* pContext = NULL);

  int GetDirectNum();

  CFX_ByteString GetString(FX_DWORD objnum, FX_DWORD gennum);

  CFX_ByteString GetName();

  CFX_ByteString GetKeyword();

  void GetBinary(uint8_t* buffer, FX_DWORD size);

  void ToNextLine();

  void ToNextWord();

  FX_BOOL SearchWord(const CFX_ByteStringC& word,
                     FX_BOOL bWholeWord,
                     FX_BOOL bForward,
                     FX_FILESIZE limit);

  int SearchMultiWord(const CFX_ByteStringC& words,
                      FX_BOOL bWholeWord,
                      FX_FILESIZE limit);

  FX_FILESIZE FindTag(const CFX_ByteStringC& tag, FX_FILESIZE limit);

  void SetEncrypt(CPDF_CryptoHandler* pCryptoHandler) {
    m_pCryptoHandler.reset(pCryptoHandler);
  }

  FX_BOOL IsEncrypted() { return m_pCryptoHandler != NULL; }

  FX_BOOL GetCharAt(FX_FILESIZE pos, uint8_t& ch);

  FX_BOOL ReadBlock(uint8_t* pBuf, FX_DWORD size);

  CFX_ByteString GetNextWord(FX_BOOL& bIsNumber);

 protected:
  static const int kParserMaxRecursionDepth = 64;
  static int s_CurrentRecursionDepth;

  virtual FX_BOOL GetNextChar(uint8_t& ch);

  FX_BOOL GetCharAtBackward(FX_FILESIZE pos, uint8_t& ch);

  void GetNextWord();

  FX_BOOL IsWholeWord(FX_FILESIZE startpos,
                      FX_FILESIZE limit,
                      const uint8_t* tag,
                      FX_DWORD taglen,
                      FX_BOOL checkKeyword);

  CFX_ByteString ReadString();

  CFX_ByteString ReadHexString();

  unsigned int ReadEOLMarkers(FX_FILESIZE pos);

  CPDF_Stream* ReadStream(CPDF_Dictionary* pDict,
                          PARSE_CONTEXT* pContext,
                          FX_DWORD objnum,
                          FX_DWORD gennum);

  FX_FILESIZE m_Pos;

  FX_BOOL m_bFileStream;

  int m_MetadataObjnum;

  IFX_FileRead* m_pFileAccess;

  FX_DWORD m_HeaderOffset;

  FX_FILESIZE m_FileLen;

  uint8_t* m_pFileBuf;

  FX_DWORD m_BufSize;

  FX_FILESIZE m_BufOffset;

  nonstd::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;

  uint8_t m_WordBuffer[257];

  FX_DWORD m_WordSize;

  FX_BOOL m_bIsNumber;

  FX_FILESIZE m_dwWordPos;
  friend class CPDF_Parser;
  friend class CPDF_DataAvail;
};

#define PDFPARSE_TYPEONLY 1
#define PDFPARSE_NOSTREAM 2
struct PARSE_CONTEXT {
  uint32_t m_Flags;
  FX_FILESIZE m_DictStart;
  FX_FILESIZE m_DictEnd;
  FX_FILESIZE m_DataStart;
  FX_FILESIZE m_DataEnd;
};

#define PDFPARSE_ERROR_SUCCESS 0
#define PDFPARSE_ERROR_FILE 1
#define PDFPARSE_ERROR_FORMAT 2
#define PDFPARSE_ERROR_PASSWORD 3
#define PDFPARSE_ERROR_HANDLER 4
#define PDFPARSE_ERROR_CERT 5

class CPDF_Parser {
 public:
  CPDF_Parser();
  ~CPDF_Parser();

  FX_DWORD StartParse(IFX_FileRead* pFile,
                      FX_BOOL bReParse = FALSE,
                      FX_BOOL bOwnFileRead = TRUE);

  void CloseParser(FX_BOOL bReParse = FALSE);

  FX_DWORD GetPermissions(FX_BOOL bCheckRevision = FALSE);

  FX_BOOL IsOwner();

  void SetPassword(const FX_CHAR* password) { m_Password = password; }

  CFX_ByteString GetPassword() { return m_Password; }

  CPDF_SecurityHandler* GetSecurityHandler() {
    return m_pSecurityHandler.get();
  }

  CPDF_CryptoHandler* GetCryptoHandler() {
    return m_Syntax.m_pCryptoHandler.get();
  }

  void SetSecurityHandler(CPDF_SecurityHandler* pSecurityHandler,
                          FX_BOOL bForced = FALSE);

  CFX_ByteString GetRecipient() { return m_bsRecipient; }

  CPDF_Dictionary* GetTrailer() { return m_pTrailer; }

  FX_FILESIZE GetLastXRefOffset() { return m_LastXRefOffset; }

  CPDF_Document* GetDocument() { return m_pDocument; }

  CFX_ArrayTemplate<CPDF_Dictionary*>* GetOtherTrailers() {
    return &m_Trailers;
  }

  FX_DWORD GetRootObjNum();
  FX_DWORD GetInfoObjNum();
  CPDF_Array* GetIDArray();

  CPDF_Dictionary* GetEncryptDict() { return m_pEncryptDict; }

  FX_BOOL IsEncrypted() { return GetEncryptDict() != NULL; }

  CPDF_Object* ParseIndirectObject(CPDF_IndirectObjects* pObjList,
                                   FX_DWORD objnum,
                                   PARSE_CONTEXT* pContext = NULL);
  FX_DWORD GetLastObjNum();
  FX_BOOL IsFormStream(FX_DWORD objnum, FX_BOOL& bForm);

  FX_FILESIZE GetObjectOffset(FX_DWORD objnum);

  FX_FILESIZE GetObjectSize(FX_DWORD objnum);

  int GetObjectVersion(FX_DWORD objnum) { return m_ObjVersion[objnum]; }

  void GetIndirectBinary(FX_DWORD objnum, uint8_t*& pBuffer, FX_DWORD& size);

  FX_BOOL GetFileStreamOption() { return m_Syntax.m_bFileStream; }

  void SetFileStreamOption(FX_BOOL b) { m_Syntax.m_bFileStream = b; }

  IFX_FileRead* GetFileAccess() const { return m_Syntax.m_pFileAccess; }

  int GetFileVersion() const { return m_FileVersion; }

  FX_BOOL IsXRefStream() const { return m_bXRefStream; }
  CPDF_Object* ParseIndirectObjectAt(CPDF_IndirectObjects* pObjList,
                                     FX_FILESIZE pos,
                                     FX_DWORD objnum,
                                     struct PARSE_CONTEXT* pContext);

  CPDF_Object* ParseIndirectObjectAtByStrict(CPDF_IndirectObjects* pObjList,
                                             FX_FILESIZE pos,
                                             FX_DWORD objnum,
                                             struct PARSE_CONTEXT* pContext,
                                             FX_FILESIZE* pResultPos);

  FX_DWORD StartAsynParse(IFX_FileRead* pFile,
                          FX_BOOL bReParse = FALSE,
                          FX_BOOL bOwnFileRead = TRUE);

  FX_DWORD GetFirstPageNo() { return m_dwFirstPageNo; }

 protected:
  CPDF_Document* m_pDocument;

  CPDF_SyntaxParser m_Syntax;
  FX_BOOL m_bOwnFileRead;
  CPDF_Object* ParseDirect(CPDF_Object* pObj);

  FX_BOOL LoadAllCrossRefV4(FX_FILESIZE pos);

  FX_BOOL LoadAllCrossRefV5(FX_FILESIZE pos);

  bool LoadCrossRefV4(FX_FILESIZE pos,
                      FX_FILESIZE streampos,
                      FX_BOOL bSkip,
                      FX_BOOL bFirst);

  FX_BOOL LoadCrossRefV5(FX_FILESIZE pos, FX_FILESIZE& prev, FX_BOOL bMainXRef);

  CPDF_Dictionary* LoadTrailerV4();

  FX_BOOL RebuildCrossRef();

  FX_DWORD SetEncryptHandler();

  void ReleaseEncryptHandler();

  FX_BOOL LoadLinearizedAllCrossRefV4(FX_FILESIZE pos, FX_DWORD dwObjCount);

  FX_BOOL LoadLinearizedCrossRefV4(FX_FILESIZE pos, FX_DWORD dwObjCount);

  FX_BOOL LoadLinearizedAllCrossRefV5(FX_FILESIZE pos);

  FX_DWORD LoadLinearizedMainXRefTable();

  CFX_MapPtrToPtr m_ObjectStreamMap;

  CPDF_StreamAcc* GetObjectStream(FX_DWORD number);

  FX_BOOL IsLinearizedFile(IFX_FileRead* pFileAccess, FX_DWORD offset);

  bool FindPosInOffsets(FX_FILESIZE pos) const;

  int m_FileVersion;

  CPDF_Dictionary* m_pTrailer;

  CPDF_Dictionary* m_pEncryptDict;
  void SetEncryptDictionary(CPDF_Dictionary* pDict);

  FX_FILESIZE m_LastXRefOffset;

  FX_BOOL m_bXRefStream;

  nonstd::unique_ptr<CPDF_SecurityHandler> m_pSecurityHandler;

  FX_BOOL m_bForceUseSecurityHandler;

  CFX_ByteString m_bsRecipient;

  CFX_ByteString m_FilePath;

  CFX_ByteString m_Password;

  CFX_FileSizeArray m_CrossRef;

  CFX_ByteArray m_V5Type;

  CFX_FileSizeArray m_SortedOffset;

  CFX_WordArray m_ObjVersion;
  CFX_ArrayTemplate<CPDF_Dictionary*> m_Trailers;

  FX_BOOL m_bVersionUpdated;

  CPDF_Object* m_pLinearized;

  FX_DWORD m_dwFirstPageNo;

  FX_DWORD m_dwXrefStartObjNum;
  friend class CPDF_Creator;
  friend class CPDF_DataAvail;
};
#define FXCIPHER_NONE 0
#define FXCIPHER_RC4 1
#define FXCIPHER_AES 2
#define FXCIPHER_AES2 3
class CPDF_SecurityHandler {
 public:
  virtual ~CPDF_SecurityHandler() {}

  virtual FX_BOOL OnInit(CPDF_Parser* pParser,
                         CPDF_Dictionary* pEncryptDict) = 0;

  virtual FX_DWORD GetPermissions() = 0;

  virtual FX_BOOL IsOwner() = 0;

  virtual FX_BOOL GetCryptInfo(int& cipher,
                               const uint8_t*& buffer,
                               int& keylen) = 0;

  virtual FX_BOOL IsMetadataEncrypted() { return TRUE; }

  virtual CPDF_CryptoHandler* CreateCryptoHandler() = 0;

  virtual CPDF_StandardSecurityHandler* GetStandardHandler() { return NULL; }
};
#define PDF_ENCRYPT_CONTENT 0
class CPDF_StandardSecurityHandler : public CPDF_SecurityHandler {
 public:
  CPDF_StandardSecurityHandler();
  ~CPDF_StandardSecurityHandler() override;

  // CPDF_SecurityHandler
  FX_BOOL OnInit(CPDF_Parser* pParser, CPDF_Dictionary* pEncryptDict) override;
  FX_DWORD GetPermissions() override;
  FX_BOOL IsOwner() override { return m_bOwner; }
  FX_BOOL GetCryptInfo(int& cipher,
                       const uint8_t*& buffer,
                       int& keylen) override;
  FX_BOOL IsMetadataEncrypted() override;
  CPDF_CryptoHandler* CreateCryptoHandler() override;
  CPDF_StandardSecurityHandler* GetStandardHandler() override { return this; }

  void OnCreate(CPDF_Dictionary* pEncryptDict,
                CPDF_Array* pIdArray,
                const uint8_t* user_pass,
                FX_DWORD user_size,
                const uint8_t* owner_pass,
                FX_DWORD owner_size,
                FX_DWORD type = PDF_ENCRYPT_CONTENT);

  void OnCreate(CPDF_Dictionary* pEncryptDict,
                CPDF_Array* pIdArray,
                const uint8_t* user_pass,
                FX_DWORD user_size,
                FX_DWORD type = PDF_ENCRYPT_CONTENT);

  CFX_ByteString GetUserPassword(const uint8_t* owner_pass, FX_DWORD pass_size);
  CFX_ByteString GetUserPassword(const uint8_t* owner_pass,
                                 FX_DWORD pass_size,
                                 int32_t key_len);
  int GetVersion() { return m_Version; }
  int GetRevision() { return m_Revision; }

  int CheckPassword(const uint8_t* password,
                    FX_DWORD pass_size,
                    FX_BOOL bOwner,
                    uint8_t* key);
  int CheckPassword(const uint8_t* password,
                    FX_DWORD pass_size,
                    FX_BOOL bOwner,
                    uint8_t* key,
                    int key_len);

 private:
  int m_Version;

  int m_Revision;

  CPDF_Parser* m_pParser;

  CPDF_Dictionary* m_pEncryptDict;

  FX_BOOL LoadDict(CPDF_Dictionary* pEncryptDict);
  FX_BOOL LoadDict(CPDF_Dictionary* pEncryptDict,
                   FX_DWORD type,
                   int& cipher,
                   int& key_len);

  FX_BOOL CheckUserPassword(const uint8_t* password,
                            FX_DWORD pass_size,
                            FX_BOOL bIgnoreEncryptMeta,
                            uint8_t* key,
                            int32_t key_len);

  FX_BOOL CheckOwnerPassword(const uint8_t* password,
                             FX_DWORD pass_size,
                             uint8_t* key,
                             int32_t key_len);
  FX_BOOL AES256_CheckPassword(const uint8_t* password,
                               FX_DWORD size,
                               FX_BOOL bOwner,
                               uint8_t* key);
  void AES256_SetPassword(CPDF_Dictionary* pEncryptDict,
                          const uint8_t* password,
                          FX_DWORD size,
                          FX_BOOL bOwner,
                          const uint8_t* key);
  void AES256_SetPerms(CPDF_Dictionary* pEncryptDict,
                       FX_DWORD permission,
                       FX_BOOL bEncryptMetadata,
                       const uint8_t* key);
  void OnCreate(CPDF_Dictionary* pEncryptDict,
                CPDF_Array* pIdArray,
                const uint8_t* user_pass,
                FX_DWORD user_size,
                const uint8_t* owner_pass,
                FX_DWORD owner_size,
                FX_BOOL bDefault,
                FX_DWORD type);
  FX_BOOL CheckSecurity(int32_t key_len);

  FX_BOOL m_bOwner;

  FX_DWORD m_Permissions;

  int m_Cipher;

  uint8_t m_EncryptKey[32];

  int m_KeyLen;
};
class CPDF_CryptoHandler {
 public:
  virtual ~CPDF_CryptoHandler() {}

  virtual FX_BOOL Init(CPDF_Dictionary* pEncryptDict,
                       CPDF_SecurityHandler* pSecurityHandler) = 0;

  virtual FX_DWORD DecryptGetSize(FX_DWORD src_size) = 0;

  virtual void* DecryptStart(FX_DWORD objnum, FX_DWORD gennum) = 0;

  virtual FX_BOOL DecryptStream(void* context,
                                const uint8_t* src_buf,
                                FX_DWORD src_size,
                                CFX_BinaryBuf& dest_buf) = 0;

  virtual FX_BOOL DecryptFinish(void* context, CFX_BinaryBuf& dest_buf) = 0;

  virtual FX_DWORD EncryptGetSize(FX_DWORD objnum,
                                  FX_DWORD version,
                                  const uint8_t* src_buf,
                                  FX_DWORD src_size) = 0;

  virtual FX_BOOL EncryptContent(FX_DWORD objnum,
                                 FX_DWORD version,
                                 const uint8_t* src_buf,
                                 FX_DWORD src_size,
                                 uint8_t* dest_buf,
                                 FX_DWORD& dest_size) = 0;

  void Decrypt(FX_DWORD objnum, FX_DWORD version, CFX_ByteString& str);
};
class CPDF_StandardCryptoHandler : public CPDF_CryptoHandler {
 public:
  CPDF_StandardCryptoHandler();
  ~CPDF_StandardCryptoHandler() override;

  // CPDF_CryptoHandler
  FX_BOOL Init(CPDF_Dictionary* pEncryptDict,
               CPDF_SecurityHandler* pSecurityHandler) override;
  FX_DWORD DecryptGetSize(FX_DWORD src_size) override;
  void* DecryptStart(FX_DWORD objnum, FX_DWORD gennum) override;
  FX_BOOL DecryptStream(void* context,
                        const uint8_t* src_buf,
                        FX_DWORD src_size,
                        CFX_BinaryBuf& dest_buf) override;
  FX_BOOL DecryptFinish(void* context, CFX_BinaryBuf& dest_buf) override;
  FX_DWORD EncryptGetSize(FX_DWORD objnum,
                          FX_DWORD version,
                          const uint8_t* src_buf,
                          FX_DWORD src_size) override;
  FX_BOOL EncryptContent(FX_DWORD objnum,
                         FX_DWORD version,
                         const uint8_t* src_buf,
                         FX_DWORD src_size,
                         uint8_t* dest_buf,
                         FX_DWORD& dest_size) override;

  FX_BOOL Init(int cipher, const uint8_t* key, int keylen);

 protected:
  virtual void CryptBlock(FX_BOOL bEncrypt,
                          FX_DWORD objnum,
                          FX_DWORD gennum,
                          const uint8_t* src_buf,
                          FX_DWORD src_size,
                          uint8_t* dest_buf,
                          FX_DWORD& dest_size);
  virtual void* CryptStart(FX_DWORD objnum, FX_DWORD gennum, FX_BOOL bEncrypt);
  virtual FX_BOOL CryptStream(void* context,
                              const uint8_t* src_buf,
                              FX_DWORD src_size,
                              CFX_BinaryBuf& dest_buf,
                              FX_BOOL bEncrypt);
  virtual FX_BOOL CryptFinish(void* context,
                              CFX_BinaryBuf& dest_buf,
                              FX_BOOL bEncrypt);

  uint8_t m_EncryptKey[32];

  int m_KeyLen;

  int m_Cipher;

  uint8_t* m_pAESContext;
};
class CPDF_Point {
 public:
  CPDF_Point(FX_FLOAT xx, FX_FLOAT yy) {
    x = xx;
    y = yy;
  }

  FX_FLOAT x;

  FX_FLOAT y;
};

#define CPDF_Rect CFX_FloatRect
#define CPDF_Matrix CFX_AffineMatrix
CFX_ByteString PDF_NameDecode(const CFX_ByteStringC& orig);
CFX_ByteString PDF_NameDecode(const CFX_ByteString& orig);
CFX_ByteString PDF_NameEncode(const CFX_ByteString& orig);
CFX_ByteString PDF_EncodeString(const CFX_ByteString& src,
                                FX_BOOL bHex = FALSE);
CFX_WideString PDF_DecodeText(const uint8_t* pData,
                              FX_DWORD size,
                              CFX_CharMap* pCharMap = NULL);
inline CFX_WideString PDF_DecodeText(const CFX_ByteString& bstr,
                                     CFX_CharMap* pCharMap = NULL) {
  return PDF_DecodeText((const uint8_t*)bstr.c_str(), bstr.GetLength(),
                        pCharMap);
}
CFX_ByteString PDF_EncodeText(const FX_WCHAR* pString,
                              int len = -1,
                              CFX_CharMap* pCharMap = NULL);
inline CFX_ByteString PDF_EncodeText(const CFX_WideString& str,
                                     CFX_CharMap* pCharMap = NULL) {
  return PDF_EncodeText(str.c_str(), str.GetLength(), pCharMap);
}
FX_FLOAT PDF_ClipFloat(FX_FLOAT f);
class CFDF_Document : public CPDF_IndirectObjects {
 public:
  static CFDF_Document* CreateNewDoc();
  static CFDF_Document* ParseFile(IFX_FileRead* pFile,
                                  FX_BOOL bOwnFile = FALSE);
  static CFDF_Document* ParseMemory(const uint8_t* pData, FX_DWORD size);

  ~CFDF_Document();

  FX_BOOL WriteBuf(CFX_ByteTextBuf& buf) const;

  CPDF_Dictionary* GetRoot() const { return m_pRootDict; }

  CFX_WideString GetWin32Path() const;

 protected:
  CFDF_Document();
  void ParseStream(IFX_FileRead* pFile, FX_BOOL bOwnFile);
  CPDF_Dictionary* m_pRootDict;
  IFX_FileRead* m_pFile;
  FX_BOOL m_bOwnFile;
};

CFX_WideString FPDF_FileSpec_GetWin32Path(const CPDF_Object* pFileSpec);
void FPDF_FileSpec_SetWin32Path(CPDF_Object* pFileSpec,
                                const CFX_WideString& fullpath);

void FlateEncode(const uint8_t* src_buf,
                 FX_DWORD src_size,
                 uint8_t*& dest_buf,
                 FX_DWORD& dest_size);
void FlateEncode(const uint8_t* src_buf,
                 FX_DWORD src_size,
                 int predictor,
                 int Colors,
                 int BitsPerComponent,
                 int Columns,
                 uint8_t*& dest_buf,
                 FX_DWORD& dest_size);
FX_DWORD FlateDecode(const uint8_t* src_buf,
                     FX_DWORD src_size,
                     uint8_t*& dest_buf,
                     FX_DWORD& dest_size);
FX_DWORD RunLengthDecode(const uint8_t* src_buf,
                         FX_DWORD src_size,
                         uint8_t*& dest_buf,
                         FX_DWORD& dest_size);
FX_BOOL IsSignatureDict(const CPDF_Dictionary* pDict);

class CPDF_NumberTree {
 public:
  CPDF_NumberTree(CPDF_Dictionary* pRoot) { m_pRoot = pRoot; }

  CPDF_Object* LookupValue(int num);

 protected:
  CPDF_Dictionary* m_pRoot;
};

class IFX_FileAvail {
 public:
  virtual ~IFX_FileAvail() {}
  virtual FX_BOOL IsDataAvail(FX_FILESIZE offset, FX_DWORD size) = 0;
};
class IFX_DownloadHints {
 public:
  virtual ~IFX_DownloadHints() {}
  virtual void AddSegment(FX_FILESIZE offset, FX_DWORD size) = 0;
};
#define PDF_IS_LINEARIZED 1
#define PDF_NOT_LINEARIZED 0
#define PDF_UNKNOW_LINEARIZED -1
#define PDFFORM_NOTAVAIL 0
#define PDFFORM_AVAIL 1
#define PDFFORM_NOTEXIST 2
class IPDF_DataAvail {
 public:
  static IPDF_DataAvail* Create(IFX_FileAvail* pFileAvail,
                                IFX_FileRead* pFileRead);
  virtual ~IPDF_DataAvail() {}

  IFX_FileAvail* GetFileAvail() const { return m_pFileAvail; }
  IFX_FileRead* GetFileRead() const { return m_pFileRead; }

  virtual FX_BOOL IsDocAvail(IFX_DownloadHints* pHints) = 0;
  virtual void SetDocument(CPDF_Document* pDoc) = 0;
  virtual FX_BOOL IsPageAvail(int iPage, IFX_DownloadHints* pHints) = 0;
  virtual FX_BOOL IsLinearized() = 0;
  virtual int32_t IsFormAvail(IFX_DownloadHints* pHints) = 0;
  virtual int32_t IsLinearizedPDF() = 0;
  virtual void GetLinearizedMainXRefInfo(FX_FILESIZE* pPos,
                                         FX_DWORD* pSize) = 0;

 protected:
  IPDF_DataAvail(IFX_FileAvail* pFileAvail, IFX_FileRead* pFileRead);

  IFX_FileAvail* m_pFileAvail;
  IFX_FileRead* m_pFileRead;
};
class CPDF_SortObjNumArray {
 public:
  void AddObjNum(FX_DWORD dwObjNum);

  FX_BOOL Find(FX_DWORD dwObjNum);

  void RemoveAll() { m_number_array.RemoveAll(); }

 protected:
  FX_BOOL BinarySearch(FX_DWORD value, int& iNext);

 protected:
  CFX_DWordArray m_number_array;
};
enum PDF_PAGENODE_TYPE {
  PDF_PAGENODE_UNKOWN = 0,
  PDF_PAGENODE_PAGE,
  PDF_PAGENODE_PAGES,
  PDF_PAGENODE_ARRAY,
};
class CPDF_PageNode {
 public:
  CPDF_PageNode() : m_type(PDF_PAGENODE_UNKOWN) {}
  ~CPDF_PageNode();
  PDF_PAGENODE_TYPE m_type;
  FX_DWORD m_dwPageNo;
  CFX_PtrArray m_childNode;
};
enum PDF_DATAAVAIL_STATUS {
  PDF_DATAAVAIL_HEADER = 0,
  PDF_DATAAVAIL_FIRSTPAGE,
  PDF_DATAAVAIL_FIRSTPAGE_PREPARE,
  PDF_DATAAVAIL_END,
  PDF_DATAAVAIL_CROSSREF,
  PDF_DATAAVAIL_CROSSREF_ITEM,
  PDF_DATAAVAIL_CROSSREF_STREAM,
  PDF_DATAAVAIL_TRAILER,
  PDF_DATAAVAIL_LOADALLCRSOSSREF,
  PDF_DATAAVAIL_ROOT,
  PDF_DATAAVAIL_INFO,
  PDF_DATAAVAIL_ACROFORM,
  PDF_DATAAVAIL_ACROFORM_SUBOBJECT,
  PDF_DATAAVAIL_PAGETREE,
  PDF_DATAAVAIL_PAGE,
  PDF_DATAAVAIL_PAGE_LATERLOAD,
  PDF_DATAAVAIL_RESOURCES,
  PDF_DATAAVAIL_DONE,
  PDF_DATAAVAIL_ERROR,
  PDF_DATAAVAIL_LOADALLFILE,
  PDF_DATAAVAIL_TRAILER_APPEND
};

FX_BOOL PDF_DataDecode(const uint8_t* src_buf,
                       FX_DWORD src_size,
                       const CPDF_Dictionary* pDict,
                       uint8_t*& dest_buf,
                       FX_DWORD& dest_size,
                       CFX_ByteString& ImageEncoding,
                       CPDF_Dictionary*& pImageParms,
                       FX_DWORD estimated_size,
                       FX_BOOL bImageAcc);

#endif  // CORE_INCLUDE_FPDFAPI_FPDF_PARSER_H_