// Copyright 2014 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_FXCRT_XML_CXML_ELEMENT_H_
#define CORE_FXCRT_XML_CXML_ELEMENT_H_

#include <memory>
#include <utility>
#include <vector>

#include "core/fxcrt/xml/cxml_attritem.h"
#include "core/fxcrt/xml/cxml_object.h"

class CXML_Element : public CXML_Object {
 public:
  static std::unique_ptr<CXML_Element> Parse(const void* pBuffer, size_t size);

  CXML_Element(const CXML_Element* pParent,
               const ByteStringView& qSpace,
               const ByteStringView& tagname);
  ~CXML_Element() override;

  // CXML_Object:
  CXML_Element* AsElement() override;
  const CXML_Element* AsElement() const override;

  ByteString GetTagName() const;
  ByteString GetNamespaceURI(const ByteString& qName) const;
  const CXML_Element* GetParent() const { return m_pParent.Get(); }
  size_t CountAttrs() const { return m_AttrMap.size(); }
  void GetAttrByIndex(size_t index,
                      ByteString* space,
                      ByteString* name,
                      WideString* value) const;
  WideString GetAttrValue(const ByteStringView& name) const;

  int GetAttrInteger(const ByteStringView& name) const;

  void AppendChild(std::unique_ptr<CXML_Object> child) {
    m_Children.push_back(std::move(child));
  }

  size_t CountChildren() const { return m_Children.size(); }
  size_t CountElements(const ByteStringView& space,
                       const ByteStringView& tag) const;
  CXML_Object* GetChild(size_t index) const;
  CXML_Element* GetElement(const ByteStringView& space,
                           const ByteStringView& tag,
                           size_t nth) const;

  void SetAttribute(const ByteString& space,
                    const ByteString& name,
                    const WideString& value);

 private:
  static bool MatchesElement(const CXML_Element* pKid,
                             const ByteStringView& space,
                             const ByteStringView& tag);

  const WideString* Lookup(const ByteString& space,
                           const ByteString& name) const;

  UnownedPtr<const CXML_Element> const m_pParent;
  const ByteString m_QSpaceName;
  const ByteString m_TagName;
  std::vector<CXML_AttrItem> m_AttrMap;
  std::vector<std::unique_ptr<CXML_Object>> m_Children;
};

#endif  // CORE_FXCRT_XML_CXML_ELEMENT_H_