summaryrefslogtreecommitdiff
path: root/core/fpdfapi/parser/cpdf_array.cpp
blob: bf8b51e604784f2c05b65b859390fa6205649b6c (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
// Copyright 2016 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/fpdfapi/parser/cpdf_array.h"

#include <set>
#include <utility>

#include "core/fpdfapi/parser/cpdf_name.h"
#include "core/fpdfapi/parser/cpdf_number.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_string.h"
#include "third_party/base/logging.h"
#include "third_party/base/stl_util.h"

CPDF_Array::CPDF_Array() {}

CPDF_Array::CPDF_Array(const CFX_WeakPtr<CFX_ByteStringPool>& pPool)
    : m_pPool(pPool) {}

CPDF_Array::~CPDF_Array() {
  // Break cycles for cyclic references.
  m_ObjNum = kInvalidObjNum;
  for (auto& it : m_Objects) {
    if (it && it->GetObjNum() == kInvalidObjNum)
      it.release();
  }
}

CPDF_Object::Type CPDF_Array::GetType() const {
  return ARRAY;
}

bool CPDF_Array::IsArray() const {
  return true;
}

CPDF_Array* CPDF_Array::AsArray() {
  return this;
}

const CPDF_Array* CPDF_Array::AsArray() const {
  return this;
}

std::unique_ptr<CPDF_Object> CPDF_Array::Clone() const {
  return CloneObjectNonCyclic(false);
}

std::unique_ptr<CPDF_Object> CPDF_Array::CloneNonCyclic(
    bool bDirect,
    std::set<const CPDF_Object*>* pVisited) const {
  pVisited->insert(this);
  auto pCopy = pdfium::MakeUnique<CPDF_Array>();
  for (const auto& pValue : m_Objects) {
    if (!pdfium::ContainsKey(*pVisited, pValue.get()))
      pCopy->m_Objects.push_back(pValue->CloneNonCyclic(bDirect, pVisited));
  }
  return std::move(pCopy);
}

CFX_FloatRect CPDF_Array::GetRect() {
  CFX_FloatRect rect;
  if (!IsArray() || m_Objects.size() != 4)
    return rect;

  rect.left = GetNumberAt(0);
  rect.bottom = GetNumberAt(1);
  rect.right = GetNumberAt(2);
  rect.top = GetNumberAt(3);
  return rect;
}

CFX_Matrix CPDF_Array::GetMatrix() {
  CFX_Matrix matrix;
  if (!IsArray() || m_Objects.size() != 6)
    return CFX_Matrix();

  return CFX_Matrix(GetNumberAt(0), GetNumberAt(1), GetNumberAt(2),
                    GetNumberAt(3), GetNumberAt(4), GetNumberAt(5));
}

CPDF_Object* CPDF_Array::GetObjectAt(size_t i) const {
  if (i >= m_Objects.size())
    return nullptr;
  return m_Objects[i].get();
}

CPDF_Object* CPDF_Array::GetDirectObjectAt(size_t i) const {
  if (i >= m_Objects.size())
    return nullptr;
  return m_Objects[i]->GetDirect();
}

CFX_ByteString CPDF_Array::GetStringAt(size_t i) const {
  if (i >= m_Objects.size())
    return CFX_ByteString();
  return m_Objects[i]->GetString();
}

int CPDF_Array::GetIntegerAt(size_t i) const {
  if (i >= m_Objects.size())
    return 0;
  return m_Objects[i]->GetInteger();
}

float CPDF_Array::GetNumberAt(size_t i) const {
  if (i >= m_Objects.size())
    return 0;
  return m_Objects[i]->GetNumber();
}

CPDF_Dictionary* CPDF_Array::GetDictAt(size_t i) const {
  CPDF_Object* p = GetDirectObjectAt(i);
  if (!p)
    return nullptr;
  if (CPDF_Dictionary* pDict = p->AsDictionary())
    return pDict;
  if (CPDF_Stream* pStream = p->AsStream())
    return pStream->GetDict();
  return nullptr;
}

CPDF_Stream* CPDF_Array::GetStreamAt(size_t i) const {
  return ToStream(GetDirectObjectAt(i));
}

CPDF_Array* CPDF_Array::GetArrayAt(size_t i) const {
  return ToArray(GetDirectObjectAt(i));
}

void CPDF_Array::RemoveAt(size_t i, size_t nCount) {
  if (i >= m_Objects.size())
    return;

  if (nCount <= 0 || nCount > m_Objects.size() - i)
    return;

  m_Objects.erase(m_Objects.begin() + i, m_Objects.begin() + i + nCount);
}

void CPDF_Array::ConvertToIndirectObjectAt(size_t i,
                                           CPDF_IndirectObjectHolder* pHolder) {
  if (i >= m_Objects.size())
    return;

  if (!m_Objects[i] || m_Objects[i]->IsReference())
    return;

  CPDF_Object* pNew = pHolder->AddIndirectObject(std::move(m_Objects[i]));
  m_Objects[i] = pdfium::MakeUnique<CPDF_Reference>(pHolder, pNew->GetObjNum());
}

CPDF_Object* CPDF_Array::SetAt(size_t i, std::unique_ptr<CPDF_Object> pObj) {
  ASSERT(IsArray());
  ASSERT(!pObj || pObj->IsInline());
  if (i >= m_Objects.size()) {
    ASSERT(false);
    return nullptr;
  }
  CPDF_Object* pRet = pObj.get();
  m_Objects[i] = std::move(pObj);
  return pRet;
}

CPDF_Object* CPDF_Array::InsertAt(size_t index,
                                  std::unique_ptr<CPDF_Object> pObj) {
  ASSERT(IsArray());
  CHECK(!pObj || pObj->IsInline());
  CPDF_Object* pRet = pObj.get();
  if (index >= m_Objects.size()) {
    // Allocate space first.
    m_Objects.resize(index + 1);
    m_Objects[index] = std::move(pObj);
  } else {
    // Directly insert.
    m_Objects.insert(m_Objects.begin() + index, std::move(pObj));
  }
  return pRet;
}

CPDF_Object* CPDF_Array::Add(std::unique_ptr<CPDF_Object> pObj) {
  ASSERT(IsArray());
  CHECK(!pObj || pObj->IsInline());
  CPDF_Object* pRet = pObj.get();
  m_Objects.push_back(std::move(pObj));
  return pRet;
}