Relation list properties for Accessibility Object Model phase 1

third_party/WebKit/Source/core/dom/AccessibleNodeList.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef AccessibleNodeList_h
+#define AccessibleNodeList_h
+
+#include "core/CoreExport.h"
+#include "platform/bindings/ScriptWrappable.h"
+
+namespace blink {
+
+class AccessibleNode;
+enum class AOMRelationListProperty;
+class ExceptionState;
+
+// Accessibility Object Model node list
+// Explainer: https://github.com/WICG/aom/blob/master/explainer.md
+// Spec: https://wicg.github.io/aom/spec/
+class CORE_EXPORT AccessibleNodeList
+    : public GarbageCollectedFinalized<AccessibleNodeList>,
+      public ScriptWrappable {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  static AccessibleNodeList* Create(const HeapVector<Member<AccessibleNode>>&);
+
+  AccessibleNodeList();
+  virtual ~AccessibleNodeList();
+
+  void AddOwner(AOMRelationListProperty, AccessibleNode*);
+  void RemoveOwner(AOMRelationListProperty, AccessibleNode*);
+
+  AccessibleNode* item(unsigned offset) const;
+  void add(AccessibleNode*, AccessibleNode* = nullptr);
+  void remove(int index);
+  bool AnonymousIndexedSetter(unsigned, AccessibleNode*, ExceptionState&);
+  unsigned length() const;
+  void setLength(unsigned);
+
+  DECLARE_VIRTUAL_TRACE();
+
+ private:
+  void NotifyChanged();
+
+  HeapVector<std::pair<AOMRelationListProperty, Member<AccessibleNode>>>
+      owners_;
+  HeapVector<Member<AccessibleNode>> nodes_;
+};
+
+}  // namespace blink
+
+#endif  // AccessibleNodeList_h