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// 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
#ifndef CORE_FPDFAPI_PARSER_CPDF_ARRAY_H_
#define CORE_FPDFAPI_PARSER_CPDF_ARRAY_H_
#include <memory>
#include <set>
#include <type_traits>
#include <utility>
#include <vector>
#include "core/fpdfapi/parser/cpdf_indirect_object_holder.h"
#include "core/fpdfapi/parser/cpdf_object.h"
#include "core/fxcrt/fx_coordinates.h"
#include "third_party/base/ptr_util.h"
class CPDF_Array final : public CPDF_Object {
public:
using const_iterator =
std::vector<std::unique_ptr<CPDF_Object>>::const_iterator;
CPDF_Array();
explicit CPDF_Array(const WeakPtr<ByteStringPool>& pPool);
~CPDF_Array() override;
// CPDF_Object:
Type GetType() const override;
std::unique_ptr<CPDF_Object> Clone() const override;
bool IsArray() const override;
CPDF_Array* AsArray() override;
const CPDF_Array* AsArray() const override;
bool WriteTo(IFX_ArchiveStream* archive,
const CPDF_Encryptor* encryptor) const override;
bool IsEmpty() const { return m_Objects.empty(); }
size_t size() const { return m_Objects.size(); }
CPDF_Object* GetObjectAt(size_t index);
const CPDF_Object* GetObjectAt(size_t index) const;
CPDF_Object* GetDirectObjectAt(size_t index);
const CPDF_Object* GetDirectObjectAt(size_t index) const;
ByteString GetStringAt(size_t index) const;
WideString GetUnicodeTextAt(size_t index) const;
int GetIntegerAt(size_t index) const;
float GetNumberAt(size_t index) const;
CPDF_Dictionary* GetDictAt(size_t index);
const CPDF_Dictionary* GetDictAt(size_t index) const;
CPDF_Stream* GetStreamAt(size_t index);
const CPDF_Stream* GetStreamAt(size_t index) const;
CPDF_Array* GetArrayAt(size_t index);
const CPDF_Array* GetArrayAt(size_t index) const;
float GetFloatAt(size_t index) const { return GetNumberAt(index); }
CFX_Matrix GetMatrix() const;
CFX_FloatRect GetRect() const;
// Takes ownership of |pObj|, returns unowned pointer to it.
CPDF_Object* Add(std::unique_ptr<CPDF_Object> pObj);
CPDF_Object* SetAt(size_t index, std::unique_ptr<CPDF_Object> pObj);
CPDF_Object* InsertAt(size_t index, std::unique_ptr<CPDF_Object> pObj);
// Creates object owned by the array, returns unowned pointer to it.
// We have special cases for objects that can intern strings from
// a ByteStringPool.
template <typename T, typename... Args>
typename std::enable_if<!CanInternStrings<T>::value, T*>::type AddNew(
Args&&... args) {
return static_cast<T*>(
Add(pdfium::MakeUnique<T>(std::forward<Args>(args)...)));
}
template <typename T, typename... Args>
typename std::enable_if<CanInternStrings<T>::value, T*>::type AddNew(
Args&&... args) {
return static_cast<T*>(
Add(pdfium::MakeUnique<T>(m_pPool, std::forward<Args>(args)...)));
}
template <typename T, typename... Args>
typename std::enable_if<!CanInternStrings<T>::value, T*>::type SetNewAt(
size_t index,
Args&&... args) {
return static_cast<T*>(
SetAt(index, pdfium::MakeUnique<T>(std::forward<Args>(args)...)));
}
template <typename T, typename... Args>
typename std::enable_if<CanInternStrings<T>::value, T*>::type SetNewAt(
size_t index,
Args&&... args) {
return static_cast<T*>(SetAt(
index, pdfium::MakeUnique<T>(m_pPool, std::forward<Args>(args)...)));
}
template <typename T, typename... Args>
typename std::enable_if<!CanInternStrings<T>::value, T*>::type InsertNewAt(
size_t index,
Args&&... args) {
return static_cast<T*>(
InsertAt(index, pdfium::MakeUnique<T>(std::forward<Args>(args)...)));
}
template <typename T, typename... Args>
typename std::enable_if<CanInternStrings<T>::value, T*>::type InsertNewAt(
size_t index,
Args&&... args) {
return static_cast<T*>(InsertAt(
index, pdfium::MakeUnique<T>(m_pPool, std::forward<Args>(args)...)));
}
void Clear();
void RemoveAt(size_t index);
void ConvertToIndirectObjectAt(size_t index, CPDF_IndirectObjectHolder* pDoc);
bool IsLocked() const { return !!m_LockCount; }
private:
friend class CPDF_ArrayLocker;
std::unique_ptr<CPDF_Object> CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* pVisited) const override;
std::vector<std::unique_ptr<CPDF_Object>> m_Objects;
WeakPtr<ByteStringPool> m_pPool;
mutable uint32_t m_LockCount = 0;
};
class CPDF_ArrayLocker {
public:
using const_iterator = CPDF_Array::const_iterator;
explicit CPDF_ArrayLocker(const CPDF_Array* pArray);
~CPDF_ArrayLocker();
const_iterator begin() const {
CHECK(m_pArray->IsLocked());
return m_pArray->m_Objects.begin();
}
const_iterator end() const {
CHECK(m_pArray->IsLocked());
return m_pArray->m_Objects.end();
}
private:
UnownedPtr<const CPDF_Array> const m_pArray;
};
inline CPDF_Array* ToArray(CPDF_Object* obj) {
return obj ? obj->AsArray() : nullptr;
}
inline const CPDF_Array* ToArray(const CPDF_Object* obj) {
return obj ? obj->AsArray() : nullptr;
}
inline std::unique_ptr<CPDF_Array> ToArray(std::unique_ptr<CPDF_Object> obj) {
CPDF_Array* pArray = ToArray(obj.get());
if (!pArray)
return nullptr;
obj.release();
return std::unique_ptr<CPDF_Array>(pArray);
}
#endif // CORE_FPDFAPI_PARSER_CPDF_ARRAY_H_
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