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
|
// 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"
#include "third_party/base/stl_util.h"
CPDF_StructKid::CPDF_StructKid()
: m_Type(Invalid),
m_pDict(nullptr),
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,
CPDF_Dictionary* pDict)
: m_pTree(pTree),
m_pParent(pParent),
m_pDict(pDict),
m_Type(pDict->GetStringFor("S")) {
if (pTree->GetRoleMap()) {
CFX_ByteString mapped = pTree->GetRoleMap()->GetStringFor(m_Type);
if (!mapped.IsEmpty())
m_Type = mapped;
}
LoadKids(pDict);
}
CPDF_StructElement::~CPDF_StructElement() = default;
int CPDF_StructElement::CountKids() const {
return pdfium::CollectionSize<int>(m_Kids);
}
CPDF_StructElement* CPDF_StructElement::GetKidIfElement(int index) const {
return m_Kids[index].m_Type == CPDF_StructKid::Element
? m_Kids[index].m_pElement.Get()
: nullptr;
}
void CPDF_StructElement::LoadKids(CPDF_Dictionary* pDict) {
CPDF_Object* pObj = pDict->GetObjectFor("Pg");
uint32_t PageObjNum = 0;
if (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();
CFX_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, this, pKidDict);
}
|
