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diff --git a/accessible/xul/XULListboxAccessible.h b/accessible/xul/XULListboxAccessible.h
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+++ b/accessible/xul/XULListboxAccessible.h
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_a11y_XULListboxAccessible_h__
+#define mozilla_a11y_XULListboxAccessible_h__
+
+#include "BaseAccessibles.h"
+#include "TableAccessible.h"
+#include "TableCellAccessible.h"
+#include "XULMenuAccessible.h"
+#include "XULSelectControlAccessible.h"
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * XULColumAccessible are accessible for list and tree columns elements
+ * (xul:treecols and xul:listheader).
+ */
+class XULColumAccessible : public AccessibleWrap {
+ public:
+  XULColumAccessible(nsIContent* aContent, DocAccessible* aDoc);
+
+  // Accessible
+  virtual a11y::role NativeRole() const override;
+  virtual uint64_t NativeState() const override;
+};
+
+/**
+ * XULColumnItemAccessible are accessibles for list and tree column elements
+ * (xul:treecol).
+ */
+class XULColumnItemAccessible : public LeafAccessible {
+ public:
+  XULColumnItemAccessible(nsIContent* aContent, DocAccessible* aDoc);
+
+  // Accessible
+  virtual a11y::role NativeRole() const override;
+  virtual uint64_t NativeState() const override;
+
+  // ActionAccessible
+  virtual uint8_t ActionCount() const override;
+  virtual void ActionNameAt(uint8_t aIndex, nsAString& aName) override;
+  virtual bool DoAction(uint8_t aIndex) const override;
+
+  enum { eAction_Click = 0 };
+};
+
+/*
+ * A class the represents the XUL Listbox widget.
+ */
+class XULListboxAccessible : public XULSelectControlAccessible,
+                             public TableAccessible {
+ public:
+  XULListboxAccessible(nsIContent* aContent, DocAccessible* aDoc);
+
+  // TableAccessible
+  virtual uint32_t ColCount() const override;
+  virtual uint32_t RowCount() override;
+  virtual Accessible* CellAt(uint32_t aRowIndex,
+                             uint32_t aColumnIndex) override;
+  virtual bool IsColSelected(uint32_t aColIdx) override;
+  virtual bool IsRowSelected(uint32_t aRowIdx) override;
+  virtual bool IsCellSelected(uint32_t aRowIdx, uint32_t aColIdx) override;
+  virtual uint32_t SelectedCellCount() override;
+  virtual uint32_t SelectedColCount() override;
+  virtual uint32_t SelectedRowCount() override;
+  virtual void SelectedCells(nsTArray<Accessible*>* aCells) override;
+  virtual void SelectedCellIndices(nsTArray<uint32_t>* aCells) override;
+  virtual void SelectedColIndices(nsTArray<uint32_t>* aCols) override;
+  virtual void SelectedRowIndices(nsTArray<uint32_t>* aRows) override;
+  virtual void SelectRow(uint32_t aRowIdx) override;
+  virtual void UnselectRow(uint32_t aRowIdx) override;
+  virtual Accessible* AsAccessible() override { return this; }
+
+  // Accessible
+  virtual TableAccessible* AsTable() override { return this; }
+  virtual a11y::role NativeRole() const override;
+  virtual uint64_t NativeState() const override;
+
+  // Widgets
+  virtual bool IsWidget() const override;
+  virtual bool IsActiveWidget() const override;
+  virtual bool AreItemsOperable() const override;
+
+  virtual Accessible* ContainerWidget() const override;
+
+ protected:
+  virtual ~XULListboxAccessible() {}
+
+  bool IsMulticolumn() const { return ColCount() > 1; }
+};
+
+/**
+ * Listitems -- used in listboxes
+ */
+class XULListitemAccessible : public XULMenuitemAccessible {
+ public:
+  enum { eAction_Click = 0 };
+
+  NS_INLINE_DECL_REFCOUNTING_INHERITED(XULListitemAccessible,
+                                       XULMenuitemAccessible)
+
+  XULListitemAccessible(nsIContent* aContent, DocAccessible* aDoc);
+
+  // Accessible
+  virtual void Description(nsString& aDesc) override;
+  virtual a11y::role NativeRole() const override;
+  virtual uint64_t NativeState() const override;
+  virtual uint64_t NativeInteractiveState() const override;
+
+  // Actions
+  virtual void ActionNameAt(uint8_t index, nsAString& aName) override;
+
+  // Widgets
+  virtual Accessible* ContainerWidget() const override;
+
+ protected:
+  virtual ~XULListitemAccessible();
+
+  // Accessible
+  virtual ENameValueFlag NativeName(nsString& aName) const override;
+
+  // XULListitemAccessible
+
+  /**
+   * Return listbox accessible for the listitem.
+   */
+  Accessible* GetListAccessible() const;
+
+ private:
+  bool mIsCheckbox;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif