diff options
Diffstat (limited to 'core/fpdfapi/parser/cpdf_reference.cpp')
-rw-r--r-- | core/fpdfapi/parser/cpdf_reference.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/core/fpdfapi/parser/cpdf_reference.cpp b/core/fpdfapi/parser/cpdf_reference.cpp new file mode 100644 index 0000000000..a9cdf54855 --- /dev/null +++ b/core/fpdfapi/parser/cpdf_reference.cpp @@ -0,0 +1,83 @@ +// 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_reference.h" + +#include "core/fpdfapi/parser/cpdf_indirect_object_holder.h" +#include "third_party/base/stl_util.h" + +CPDF_Reference::CPDF_Reference(CPDF_IndirectObjectHolder* pDoc, int objnum) + : m_pObjList(pDoc), m_RefObjNum(objnum) {} + +CPDF_Reference::~CPDF_Reference() {} + +CPDF_Object::Type CPDF_Reference::GetType() const { + return REFERENCE; +} + +CFX_ByteString CPDF_Reference::GetString() const { + CPDF_Object* obj = SafeGetDirect(); + return obj ? obj->GetString() : CFX_ByteString(); +} + +FX_FLOAT CPDF_Reference::GetNumber() const { + CPDF_Object* obj = SafeGetDirect(); + return obj ? obj->GetNumber() : 0; +} + +int CPDF_Reference::GetInteger() const { + CPDF_Object* obj = SafeGetDirect(); + return obj ? obj->GetInteger() : 0; +} + +CPDF_Dictionary* CPDF_Reference::GetDict() const { + CPDF_Object* obj = SafeGetDirect(); + return obj ? obj->GetDict() : nullptr; +} + +bool CPDF_Reference::IsReference() const { + return true; +} + +CPDF_Reference* CPDF_Reference::AsReference() { + return this; +} + +const CPDF_Reference* CPDF_Reference::AsReference() const { + return this; +} + +CPDF_Object* CPDF_Reference::Clone() const { + return CloneObjectNonCyclic(false); +} + +CPDF_Object* CPDF_Reference::CloneNonCyclic( + bool bDirect, + std::set<const CPDF_Object*>* pVisited) const { + pVisited->insert(this); + if (bDirect) { + auto* pDirect = GetDirect(); + return pDirect && !pdfium::ContainsKey(*pVisited, pDirect) + ? pDirect->CloneNonCyclic(true, pVisited) + : nullptr; + } + return new CPDF_Reference(m_pObjList, m_RefObjNum); +} + +CPDF_Object* CPDF_Reference::SafeGetDirect() const { + CPDF_Object* obj = GetDirect(); + return (obj && !obj->IsReference()) ? obj : nullptr; +} + +void CPDF_Reference::SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum) { + m_pObjList = pDoc; + m_RefObjNum = objnum; +} + +CPDF_Object* CPDF_Reference::GetDirect() const { + return m_pObjList ? m_pObjList->GetOrParseIndirectObject(m_RefObjNum) + : nullptr; +} |