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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_DICTIONARY_H_
#define CORE_FPDFAPI_PARSER_CPDF_DICTIONARY_H_
#include <map>
#include <memory>
#include <set>
#include <utility>
#include <vector>
#include "core/fpdfapi/parser/cpdf_object.h"
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/string_pool_template.h"
#include "core/fxcrt/weak_ptr.h"
#include "third_party/base/logging.h"
#include "third_party/base/ptr_util.h"
class CPDF_IndirectObjectHolder;
class CPDF_Dictionary final : public CPDF_Object {
public:
using const_iterator =
std::map<ByteString, std::unique_ptr<CPDF_Object>>::const_iterator;
CPDF_Dictionary();
explicit CPDF_Dictionary(const WeakPtr<ByteStringPool>& pPool);
~CPDF_Dictionary() override;
// CPDF_Object:
Type GetType() const override;
std::unique_ptr<CPDF_Object> Clone() const override;
CPDF_Dictionary* GetDict() override;
const CPDF_Dictionary* GetDict() const override;
bool IsDictionary() const override;
CPDF_Dictionary* AsDictionary() override;
const CPDF_Dictionary* AsDictionary() const override;
bool WriteTo(IFX_ArchiveStream* archive,
const CPDF_Encryptor* encryptor) const override;
bool IsLocked() const { return !!m_LockCount; }
size_t size() const { return m_Map.size(); }
const CPDF_Object* GetObjectFor(const ByteString& key) const;
CPDF_Object* GetObjectFor(const ByteString& key);
const CPDF_Object* GetDirectObjectFor(const ByteString& key) const;
CPDF_Object* GetDirectObjectFor(const ByteString& key);
ByteString GetStringFor(const ByteString& key) const;
ByteString GetStringFor(const ByteString& key,
const ByteString& default_str) const;
WideString GetUnicodeTextFor(const ByteString& key) const;
int GetIntegerFor(const ByteString& key) const;
int GetIntegerFor(const ByteString& key, int default_int) const;
bool GetBooleanFor(const ByteString& key, bool bDefault) const;
float GetNumberFor(const ByteString& key) const;
const CPDF_Dictionary* GetDictFor(const ByteString& key) const;
CPDF_Dictionary* GetDictFor(const ByteString& key);
const CPDF_Stream* GetStreamFor(const ByteString& key) const;
CPDF_Stream* GetStreamFor(const ByteString& key);
const CPDF_Array* GetArrayFor(const ByteString& key) const;
CPDF_Array* GetArrayFor(const ByteString& key);
CFX_FloatRect GetRectFor(const ByteString& key) const;
CFX_Matrix GetMatrixFor(const ByteString& key) const;
float GetFloatFor(const ByteString& key) const { return GetNumberFor(key); }
bool KeyExist(const ByteString& key) const;
std::vector<ByteString> GetKeys() const;
// Set* functions invalidate iterators for the element with the key |key|.
// Takes ownership of |pObj|, returns an unowned pointer to it.
CPDF_Object* SetFor(const ByteString& key, std::unique_ptr<CPDF_Object> pObj);
// Creates a new object owned by the dictionary and returns an unowned
// pointer to it.
template <typename T, typename... Args>
typename std::enable_if<!CanInternStrings<T>::value, T*>::type SetNewFor(
const ByteString& key,
Args&&... args) {
CHECK(!IsLocked());
return static_cast<T*>(
SetFor(key, pdfium::MakeUnique<T>(std::forward<Args>(args)...)));
}
template <typename T, typename... Args>
typename std::enable_if<CanInternStrings<T>::value, T*>::type SetNewFor(
const ByteString& key,
Args&&... args) {
CHECK(!IsLocked());
return static_cast<T*>(SetFor(
key, pdfium::MakeUnique<T>(m_pPool, std::forward<Args>(args)...)));
}
// Convenience functions to convert native objects to array form.
void SetRectFor(const ByteString& key, const CFX_FloatRect& rect);
void SetMatrixFor(const ByteString& key, const CFX_Matrix& matrix);
void ConvertToIndirectObjectFor(const ByteString& key,
CPDF_IndirectObjectHolder* pHolder);
// Invalidates iterators for the element with the key |key|.
std::unique_ptr<CPDF_Object> RemoveFor(const ByteString& key);
// Invalidates iterators for the element with the key |oldkey|.
void ReplaceKey(const ByteString& oldkey, const ByteString& newkey);
WeakPtr<ByteStringPool> GetByteStringPool() const { return m_pPool; }
private:
friend class CPDF_DictionaryLocker;
ByteString MaybeIntern(const ByteString& str);
std::unique_ptr<CPDF_Object> CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* visited) const override;
mutable uint32_t m_LockCount = 0;
WeakPtr<ByteStringPool> m_pPool;
std::map<ByteString, std::unique_ptr<CPDF_Object>> m_Map;
};
class CPDF_DictionaryLocker {
public:
using const_iterator = CPDF_Dictionary::const_iterator;
explicit CPDF_DictionaryLocker(const CPDF_Dictionary* pDictionary);
~CPDF_DictionaryLocker();
const_iterator begin() const {
CHECK(m_pDictionary->IsLocked());
return m_pDictionary->m_Map.begin();
}
const_iterator end() const {
CHECK(m_pDictionary->IsLocked());
return m_pDictionary->m_Map.end();
}
private:
UnownedPtr<const CPDF_Dictionary> const m_pDictionary;
};
inline CPDF_Dictionary* ToDictionary(CPDF_Object* obj) {
return obj ? obj->AsDictionary() : nullptr;
}
inline const CPDF_Dictionary* ToDictionary(const CPDF_Object* obj) {
return obj ? obj->AsDictionary() : nullptr;
}
inline std::unique_ptr<CPDF_Dictionary> ToDictionary(
std::unique_ptr<CPDF_Object> obj) {
CPDF_Dictionary* pDict = ToDictionary(obj.get());
if (!pDict)
return nullptr;
obj.release();
return std::unique_ptr<CPDF_Dictionary>(pDict);
}
#endif // CORE_FPDFAPI_PARSER_CPDF_DICTIONARY_H_
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