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
|
// Copyright 2017 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
#include "core/fpdfdoc/cpdf_structelement.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_name.h"
#include "core/fpdfapi/parser/cpdf_number.h"
#include "core/fpdfapi/parser/cpdf_object.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfdoc/cpdf_structtree.h"
CPDF_StructKid::CPDF_StructKid()
: m_Type(Invalid),
m_PageObjNum(0),
m_RefObjNum(0),
m_ContentId(0) {}
CPDF_StructKid::CPDF_StructKid(const CPDF_StructKid& that) = default;
CPDF_StructKid::~CPDF_StructKid() = default;
CPDF_StructElement::CPDF_StructElement(CPDF_StructTree* pTree,
CPDF_StructElement* pParent,
const CPDF_Dictionary* pDict)
: m_pTree(pTree),
m_pParent(pParent),
m_pDict(pDict),
m_Type(pDict->GetStringFor("S")),
m_Title(pDict->GetStringFor("T")) {
if (pTree->GetRoleMap()) {
ByteString mapped = pTree->GetRoleMap()->GetStringFor(m_Type);
if (!mapped.IsEmpty())
m_Type = mapped;
}
LoadKids(pDict);
}
CPDF_StructElement::~CPDF_StructElement() = default;
size_t CPDF_StructElement::CountKids() const {
return m_Kids.size();
}
CPDF_StructElement* CPDF_StructElement::GetKidIfElement(size_t index) const {
return m_Kids[index].m_Type == CPDF_StructKid::Element
? m_Kids[index].m_pElement.Get()
: nullptr;
}
void CPDF_StructElement::LoadKids(const CPDF_Dictionary* pDict) {
const CPDF_Object* pObj = pDict->GetObjectFor("Pg");
uint32_t PageObjNum = 0;
if (const CPDF_Reference* pRef = ToReference(pObj))
PageObjNum = pRef->GetRefObjNum();
CPDF_Object* pKids = pDict->GetDirectObjectFor("K");
if (!pKids)
return;
m_Kids.clear();
if (CPDF_Array* pArray = pKids->AsArray()) {
m_Kids.resize(pArray->GetCount());
for (uint32_t i = 0; i < pArray->GetCount(); i++) {
CPDF_Object* pKid = pArray->GetDirectObjectAt(i);
LoadKid(PageObjNum, pKid, &m_Kids[i]);
}
return;
}
m_Kids.resize(1);
LoadKid(PageObjNum, pKids, &m_Kids[0]);
}
void CPDF_StructElement::LoadKid(uint32_t PageObjNum,
CPDF_Object* pKidObj,
CPDF_StructKid* pKid) {
pKid->m_Type = CPDF_StructKid::Invalid;
if (!pKidObj)
return;
if (pKidObj->IsNumber()) {
if (m_pTree->GetPage() && m_pTree->GetPage()->GetObjNum() != PageObjNum)
return;
pKid->m_Type = CPDF_StructKid::PageContent;
pKid->m_ContentId = pKidObj->GetInteger();
pKid->m_PageObjNum = PageObjNum;
return;
}
CPDF_Dictionary* pKidDict = pKidObj->AsDictionary();
if (!pKidDict)
return;
if (CPDF_Reference* pRef = ToReference(pKidDict->GetObjectFor("Pg")))
PageObjNum = pRef->GetRefObjNum();
ByteString type = pKidDict->GetStringFor("Type");
if ((type == "MCR" || type == "OBJR") && m_pTree->GetPage() &&
m_pTree->GetPage()->GetObjNum() != PageObjNum) {
return;
}
if (type == "MCR") {
pKid->m_Type = CPDF_StructKid::StreamContent;
CPDF_Reference* pRef = ToReference(pKidDict->GetObjectFor("Stm"));
pKid->m_RefObjNum = pRef ? pRef->GetRefObjNum() : 0;
pKid->m_PageObjNum = PageObjNum;
pKid->m_ContentId = pKidDict->GetIntegerFor("MCID");
return;
}
if (type == "OBJR") {
pKid->m_Type = CPDF_StructKid::Object;
CPDF_Reference* pObj = ToReference(pKidDict->GetObjectFor("Obj"));
pKid->m_RefObjNum = pObj ? pObj->GetRefObjNum() : 0;
pKid->m_PageObjNum = PageObjNum;
return;
}
pKid->m_Type = CPDF_StructKid::Element;
pKid->m_pDict = pKidDict;
if (m_pTree->GetPage()) {
pKid->m_pElement = nullptr;
return;
}
pKid->m_pElement =
pdfium::MakeRetain<CPDF_StructElement>(m_pTree.Get(), this, pKidDict);
}
|
