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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_DOM_PART_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_PART_H_
#include "third_party/blink/renderer/bindings/core/v8/frozen_array.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class Node;
class NodeCloningData;
class PartRoot;
class V8UnionChildNodePartOrDocumentPartRoot;
// Implementation of the Part class, which is part of the DOM Parts API.
class CORE_EXPORT Part : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
~Part() override = default;
void Trace(Visitor* visitor) const override;
virtual bool IsValid() const {
DCHECK_EQ(is_valid_, root_ && connected_);
return is_valid_;
}
virtual Node* NodeToSortBy() const = 0;
virtual Part* ClonePart(NodeCloningData&, Node&) const = 0;
virtual PartRoot* GetAsPartRoot() const { return nullptr; }
PartRoot* root() const { return root_.Get(); }
virtual Document& GetDocument() const = 0;
// Part API
V8UnionChildNodePartOrDocumentPartRoot* rootForBindings() const;
const FrozenArray<IDLString>& metadata() const { return *metadata_; }
virtual void disconnect();
protected:
Part(PartRoot& root, Vector<String> metadata)
: root_(root),
metadata_(
MakeGarbageCollected<FrozenArray<IDLString>>(std::move(metadata))) {
}
bool IsConnected() { return connected_; }
static bool IsAcceptableNodeType(Node& node);
private:
Member<PartRoot> root_;
Member<FrozenArray<IDLString>> metadata_;
bool connected_{true};
// Checking IsValid() is very hot during cloning, so |is_valid_| is
// a cached version of (root_ && connected_),
bool is_valid_{true};
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_PART_H_
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