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1 // Copyright 2016 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 "core/include/fpdfapi/cpdf_indirect_object_holder.h" | |
8 #include "core/include/fpdfapi/cpdf_object.h" | |
9 #include "core/include/fpdfapi/cpdf_parser.h" | |
10 | |
11 CPDF_IndirectObjectHolder::CPDF_IndirectObjectHolder(CPDF_Parser* pParser) | |
12 : m_pParser(pParser), m_LastObjNum(0) { | |
13 if (pParser) | |
14 m_LastObjNum = m_pParser->GetLastObjNum(); | |
15 } | |
16 | |
17 CPDF_IndirectObjectHolder::~CPDF_IndirectObjectHolder() { | |
18 for (const auto& pair : m_IndirectObjs) { | |
19 pair.second->Destroy(); | |
20 } | |
dsinclair
2016/03/10 21:23:45
nit: {}s
Tom Sepez
2016/03/10 22:05:19
Done.
| |
21 } | |
22 | |
23 CPDF_Object* CPDF_IndirectObjectHolder::GetIndirectObject(FX_DWORD objnum) { | |
24 if (objnum == 0) | |
25 return nullptr; | |
26 | |
27 auto it = m_IndirectObjs.find(objnum); | |
28 if (it != m_IndirectObjs.end()) | |
29 return it->second->GetObjNum() != -1 ? it->second : nullptr; | |
30 | |
31 if (!m_pParser) | |
32 return nullptr; | |
33 | |
34 CPDF_Object* pObj = m_pParser->ParseIndirectObject(this, objnum); | |
35 if (!pObj) | |
36 return nullptr; | |
37 | |
38 pObj->m_ObjNum = objnum; | |
39 m_LastObjNum = std::max(m_LastObjNum, objnum); | |
40 if (m_IndirectObjs[objnum]) | |
41 m_IndirectObjs[objnum]->Destroy(); | |
42 | |
43 m_IndirectObjs[objnum] = pObj; | |
44 return pObj; | |
45 } | |
46 | |
47 FX_DWORD CPDF_IndirectObjectHolder::AddIndirectObject(CPDF_Object* pObj) { | |
48 if (pObj->m_ObjNum) { | |
49 return pObj->m_ObjNum; | |
50 } | |
dsinclair
2016/03/10 21:23:45
nit: {}s
Tom Sepez
2016/03/10 22:05:19
Done.
| |
51 m_LastObjNum++; | |
52 m_IndirectObjs[m_LastObjNum] = pObj; | |
53 pObj->m_ObjNum = m_LastObjNum; | |
54 return m_LastObjNum; | |
55 } | |
56 | |
57 void CPDF_IndirectObjectHolder::ReleaseIndirectObject(FX_DWORD objnum) { | |
58 auto it = m_IndirectObjs.find(objnum); | |
59 if (it == m_IndirectObjs.end() || it->second->GetObjNum() == -1) | |
60 return; | |
61 it->second->Destroy(); | |
62 m_IndirectObjs.erase(it); | |
63 } | |
64 | |
65 FX_BOOL CPDF_IndirectObjectHolder::InsertIndirectObject(FX_DWORD objnum, | |
66 CPDF_Object* pObj) { | |
67 if (!objnum || !pObj) | |
68 return FALSE; | |
69 auto it = m_IndirectObjs.find(objnum); | |
70 if (it != m_IndirectObjs.end()) { | |
71 if (pObj->GetGenNum() <= it->second->GetGenNum()) { | |
72 pObj->Destroy(); | |
73 return FALSE; | |
74 } | |
75 it->second->Destroy(); | |
76 } | |
77 pObj->m_ObjNum = objnum; | |
78 m_IndirectObjs[objnum] = pObj; | |
79 m_LastObjNum = std::max(m_LastObjNum, objnum); | |
80 return TRUE; | |
81 } | |
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