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// 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
#ifndef CORE_FPDFDOC_CPDF_STRUCTTREE_H_
#define CORE_FPDFDOC_CPDF_STRUCTTREE_H_
#include <map>
#include <memory>
#include <vector>
#include "core/fxcrt/retain_ptr.h"
#include "core/fxcrt/unowned_ptr.h"
class CPDF_Dictionary;
class CPDF_Document;
class CPDF_StructElement;
class CPDF_StructTree {
public:
static std::unique_ptr<CPDF_StructTree> LoadPage(
const CPDF_Document* pDoc,
const CPDF_Dictionary* pPageDict);
explicit CPDF_StructTree(const CPDF_Document* pDoc);
~CPDF_StructTree();
size_t CountTopElements() const { return m_Kids.size(); }
CPDF_StructElement* GetTopElement(size_t i) const { return m_Kids[i].Get(); }
const CPDF_Dictionary* GetRoleMap() const { return m_pRoleMap.Get(); }
const CPDF_Dictionary* GetPage() const { return m_pPage.Get(); }
const CPDF_Dictionary* GetTreeRoot() const { return m_pTreeRoot.Get(); }
private:
using StructElementMap =
std::map<const CPDF_Dictionary*, RetainPtr<CPDF_StructElement>>;
void LoadPageTree(const CPDF_Dictionary* pPageDict);
RetainPtr<CPDF_StructElement> AddPageNode(const CPDF_Dictionary* pElement,
StructElementMap* map,
int nLevel);
bool AddTopLevelNode(const CPDF_Dictionary* pDict,
const RetainPtr<CPDF_StructElement>& pElement);
UnownedPtr<const CPDF_Dictionary> const m_pTreeRoot;
UnownedPtr<const CPDF_Dictionary> const m_pRoleMap;
UnownedPtr<const CPDF_Dictionary> m_pPage;
std::vector<RetainPtr<CPDF_StructElement>> m_Kids;
};
#endif // CORE_FPDFDOC_CPDF_STRUCTTREE_H_
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