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1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 
7 #include "../include/fsdk_define.h"
8 #include "../include/fpdf_dataavail.h"
9 
10 extern void ProcessParseError(FX_DWORD err_code);
11 class CFPDF_FileAvailWrap : public IFX_FileAvail
12 {
13 public:
CFPDF_FileAvailWrap()14 	CFPDF_FileAvailWrap()
15 	{
16 		m_pfileAvail = NULL;
17 	}
18 
Set(FX_FILEAVAIL * pfileAvail)19 	void Set(FX_FILEAVAIL* pfileAvail)
20 	{
21 		m_pfileAvail = pfileAvail;
22 	}
23 
IsDataAvail(FX_FILESIZE offset,FX_DWORD size)24 	virtual FX_BOOL			IsDataAvail( FX_FILESIZE offset, FX_DWORD size)
25 	{
26 		return m_pfileAvail->IsDataAvail(m_pfileAvail, offset, size);
27 	}
28 
29 private:
30 	FX_FILEAVAIL* m_pfileAvail;
31 };
32 
33 class CFPDF_FileAccessWrap : public IFX_FileRead
34 {
35 public:
CFPDF_FileAccessWrap()36 	CFPDF_FileAccessWrap()
37 	{
38 		m_pFileAccess = NULL;
39 	}
40 
Set(FPDF_FILEACCESS * pFile)41 	void Set(FPDF_FILEACCESS* pFile)
42 	{
43 		m_pFileAccess = pFile;
44 	}
45 
GetSize()46 	virtual FX_FILESIZE		GetSize()
47 	{
48 		return m_pFileAccess->m_FileLen;
49 	}
50 
ReadBlock(void * buffer,FX_FILESIZE offset,size_t size)51 	virtual FX_BOOL			ReadBlock(void* buffer, FX_FILESIZE offset, size_t size)
52 	{
53 		return m_pFileAccess->m_GetBlock(m_pFileAccess->m_Param, offset, (FX_LPBYTE)buffer, size);
54 	}
55 
Release()56 	virtual void			Release()
57 	{
58 	}
59 
60 private:
61 	FPDF_FILEACCESS*		m_pFileAccess;
62 };
63 
64 class CFPDF_DownloadHintsWrap : public IFX_DownloadHints
65 {
66 public:
CFPDF_DownloadHintsWrap(FX_DOWNLOADHINTS * pDownloadHints)67 	CFPDF_DownloadHintsWrap(FX_DOWNLOADHINTS* pDownloadHints)
68 	{
69 		m_pDownloadHints = pDownloadHints;
70 	}
71 public:
AddSegment(FX_FILESIZE offset,FX_DWORD size)72 	virtual void			AddSegment(FX_FILESIZE offset, FX_DWORD size)
73 	{
74 		m_pDownloadHints->AddSegment(m_pDownloadHints, offset, size);
75 	}
76 private:
77 	FX_DOWNLOADHINTS* m_pDownloadHints;
78 };
79 
80 class CFPDF_DataAvail : public CFX_Object
81 {
82 public:
CFPDF_DataAvail()83 	CFPDF_DataAvail()
84 	{
85 		m_pDataAvail = NULL;
86 	}
87 
~CFPDF_DataAvail()88 	~CFPDF_DataAvail()
89 	{
90 		if (m_pDataAvail) delete m_pDataAvail;
91 	}
92 
93 	CPDF_DataAvail*			m_pDataAvail;
94 	CFPDF_FileAvailWrap		m_FileAvail;
95 	CFPDF_FileAccessWrap	m_FileRead;
96 };
97 
FPDFAvail_Create(FX_FILEAVAIL * file_avail,FPDF_FILEACCESS * file)98 DLLEXPORT FPDF_AVAIL STDCALL FPDFAvail_Create(FX_FILEAVAIL* file_avail, FPDF_FILEACCESS* file)
99 {
100 	CFPDF_DataAvail* pAvail = FX_NEW CFPDF_DataAvail;
101 	pAvail->m_FileAvail.Set(file_avail);
102 	pAvail->m_FileRead.Set(file);
103 	pAvail->m_pDataAvail = FX_NEW CPDF_DataAvail(&pAvail->m_FileAvail, &pAvail->m_FileRead);
104 	return pAvail;
105 }
106 
FPDFAvail_Destroy(FPDF_AVAIL avail)107 DLLEXPORT void STDCALL FPDFAvail_Destroy(FPDF_AVAIL avail)
108 {
109 	if (avail == NULL) return;
110 	delete (CFPDF_DataAvail*)avail;
111 }
112 
FPDFAvail_IsDocAvail(FPDF_AVAIL avail,FX_DOWNLOADHINTS * hints)113 DLLEXPORT int STDCALL FPDFAvail_IsDocAvail(FPDF_AVAIL avail, FX_DOWNLOADHINTS* hints)
114 {
115 	if (avail == NULL || hints == NULL) return 0;
116 	CFPDF_DownloadHintsWrap hints_wrap(hints);
117 	return ((CFPDF_DataAvail*)avail)->m_pDataAvail->IsDocAvail(&hints_wrap);
118 }
119 
120 extern void CheckUnSupportError(CPDF_Document * pDoc, FX_DWORD err_code);
121 
FPDFAvail_GetDocument(FPDF_AVAIL avail,FPDF_BYTESTRING password)122 DLLEXPORT FPDF_DOCUMENT STDCALL FPDFAvail_GetDocument(FPDF_AVAIL avail,	FPDF_BYTESTRING password)
123 {
124 	if (avail == NULL) return NULL;
125 	CPDF_Parser* pParser = FX_NEW CPDF_Parser;
126 	pParser->SetPassword(password);
127 
128 	FX_DWORD err_code = pParser->StartAsynParse(((CFPDF_DataAvail*)avail)->m_pDataAvail->GetFileRead());
129 	if (err_code) {
130 		delete pParser;
131 		ProcessParseError(err_code);
132 		return NULL;
133 	}
134 	((CFPDF_DataAvail*)avail)->m_pDataAvail->SetDocument(pParser->GetDocument());
135 	CheckUnSupportError(pParser->GetDocument(), FPDF_ERR_SUCCESS);
136 	return pParser->GetDocument();
137 }
138 
FPDFAvail_GetFirstPageNum(FPDF_DOCUMENT doc)139 DLLEXPORT int STDCALL FPDFAvail_GetFirstPageNum(FPDF_DOCUMENT doc)
140 {
141 	if (doc == NULL) return 0;
142 	CPDF_Document* pDoc = (CPDF_Document*)doc;
143 	return ((CPDF_Parser*)pDoc->GetParser())->GetFirstPageNo();
144 }
145 
FPDFAvail_IsPageAvail(FPDF_AVAIL avail,int page_index,FX_DOWNLOADHINTS * hints)146 DLLEXPORT int STDCALL FPDFAvail_IsPageAvail(FPDF_AVAIL avail, int page_index, FX_DOWNLOADHINTS* hints)
147 {
148 	if (avail == NULL || hints == NULL) return 0;
149 	CFPDF_DownloadHintsWrap hints_wrap(hints);
150 	return ((CFPDF_DataAvail*)avail)->m_pDataAvail->IsPageAvail(page_index, &hints_wrap);
151 }
152 
FPDFAvail_IsFormAvail(FPDF_AVAIL avail,FX_DOWNLOADHINTS * hints)153 DLLEXPORT int STDCALL FPDFAvail_IsFormAvail(FPDF_AVAIL avail, FX_DOWNLOADHINTS* hints)
154 {
155 	if (avail == NULL || hints == NULL) return -1;
156 	CFPDF_DownloadHintsWrap hints_wrap(hints);
157 	return ((CFPDF_DataAvail*)avail)->m_pDataAvail->IsFormAvail(&hints_wrap);
158 }
159 
FPDFAvail_IsLinearized(FPDF_AVAIL avail)160 DLLEXPORT FPDF_BOOL STDCALL FPDFAvail_IsLinearized(FPDF_AVAIL avail)
161 {
162 		if (avail == NULL) return -1;
163 	return ((CFPDF_DataAvail*)avail)->m_pDataAvail->IsLinearizedPDF();
164 
165 }
166