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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_TEMPLATE_ELEMENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_TEMPLATE_ELEMENT_H_

#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/container_node.h"
#include "third_party/blink/renderer/core/dom/template_content_document_fragment.h"
#include "third_party/blink/renderer/core/html/html_element.h"

namespace blink {

class DocumentFragment;
class Patch;
class TemplateContentDocumentFragment;

class CORE_EXPORT HTMLTemplateElement final : public HTMLElement {
  DEFINE_WRAPPERTYPEINFO();

 public:
  explicit HTMLTemplateElement(Document&);
  ~HTMLTemplateElement() override;

  ElementType GetElementType() const final {
    return ElementType::kHTMLTemplateElement;
  }

  bool HasNonInBodyInsertionMode() const override { return true; }

  void Trace(Visitor*) const override;

  DocumentFragment* content() const;

  // This just retrieves existing content, and will not construct a content
  // DocumentFragment if one does not exist.
  DocumentFragment* getContent() const {
    CHECK(!override_insertion_target_ || !content_);
    return content_;
  }

  // This retrieves either a currently-being-parsed declarative shadow root,
  // or the content fragment for a "regular" template
  // element. This should only be used by HTMLConstructionSite.
  ContainerNode* InsertionTarget() const;

  void SetOverrideInsertionTarget(ContainerNode& target) {
    CHECK(target.IsShadowRoot() || target.IsDocumentFragment());
    override_insertion_target_ = ⌖
  }

  bool IsShadowRootModeTemplate() const { return override_insertion_target_; }

  void SetPatch(Patch* patch);
  Patch* GetPatch() const { return patch_; }

 private:
  void CloneNonAttributePropertiesFrom(const Element&,
                                       NodeCloningData&) override;
  void DidMoveToNewDocument(Document& old_document) override;
  void RemovedFrom(ContainerNode&) override;
  void FinishParsingChildren() override;
  mutable Member<TemplateContentDocumentFragment> content_;

  Member<ContainerNode> override_insertion_target_;
  Member<Patch> patch_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_HTML_TEMPLATE_ELEMENT_H_