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diff --git a/accessible/windows/ia2/ia2Accessible.h b/accessible/windows/ia2/ia2Accessible.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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_ia2Accessible_h_
+#define mozilla_a11y_ia2Accessible_h_
+
+#include "nsISupports.h"
+
+#include "Accessible2_3.h"
+
+namespace mozilla {
+namespace a11y {
+class Attribute;
+
+class ia2Accessible : public IAccessible2_3
+{
+public:
+
+ // IUnknown
+ STDMETHODIMP QueryInterface(REFIID, void**);
+
+ // IAccessible2
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nRelations(
+ /* [retval][out] */ long* nRelations);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_relation(
+ /* [in] */ long relationIndex,
+ /* [retval][out] */ IAccessibleRelation** relation);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_relations(
+ /* [in] */ long maxRelations,
+ /* [length_is][size_is][out] */ IAccessibleRelation** relation,
+ /* [retval][out] */ long* nRelations);
+
+ virtual HRESULT STDMETHODCALLTYPE role(
+ /* [retval][out] */ long* role);
+
+ virtual HRESULT STDMETHODCALLTYPE scrollTo(
+ /* [in] */ enum IA2ScrollType scrollType);
+
+ virtual HRESULT STDMETHODCALLTYPE scrollToPoint(
+ /* [in] */ enum IA2CoordinateType coordinateType,
+ /* [in] */ long x,
+ /* [in] */ long y);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_groupPosition(
+ /* [out] */ long* groupLevel,
+ /* [out] */ long* similarItemsInGroup,
+ /* [retval][out] */ long* positionInGroup);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_states(
+ /* [retval][out] */ AccessibleStates* states);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_extendedRole(
+ /* [retval][out] */ BSTR* extendedRole);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_localizedExtendedRole(
+ /* [retval][out] */ BSTR* localizedExtendedRole);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_nExtendedStates(
+ /* [retval][out] */ long* nExtendedStates);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_extendedStates(
+ /* [in] */ long maxExtendedStates,
+ /* [length_is][length_is][size_is][size_is][out] */ BSTR** extendedStates,
+ /* [retval][out] */ long* nExtendedStates);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_localizedExtendedStates(
+ /* [in] */ long maxLocalizedExtendedStates,
+ /* [length_is][length_is][size_is][size_is][out] */ BSTR** localizedExtendedStates,
+ /* [retval][out] */ long* nLocalizedExtendedStates);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_uniqueID(
+ /* [retval][out] */ long* uniqueID);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_windowHandle(
+ /* [retval][out] */ HWND* windowHandle);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_indexInParent(
+ /* [retval][out] */ long* indexInParent);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_locale(
+ /* [retval][out] */ IA2Locale* locale);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_attributes(
+ /* [retval][out] */ BSTR* attributes);
+
+ // IAccessible2_2
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_attribute(
+ /* [in] */ BSTR name,
+ /* [out, retval] */ VARIANT* attribute);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_accessibleWithCaret(
+ /* [out] */ IUnknown** accessible,
+ /* [out, retval] */ long* caretOffset);
+
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_relationTargetsOfType(
+ /* [in] */ BSTR type,
+ /* [in] */ long maxTargets,
+ /* [out, size_is(,*nTargets)] */ IUnknown*** targets,
+ /* [out, retval] */ long* nTargets
+ );
+
+ // IAccessible2_3
+ virtual /* [propget] */ HRESULT STDMETHODCALLTYPE get_selectionRanges(
+ /* [out, size_is(,*nRanges)] */ IA2Range** ranges,
+ /* [out, retval] */ long *nRanges);
+
+ // Helper method
+ static HRESULT ConvertToIA2Attributes(nsIPersistentProperties* aAttributes,
+ BSTR* aIA2Attributes);
+ static HRESULT ConvertToIA2Attributes(nsTArray<Attribute>* aAttributes,
+ BSTR* aIA2Attributes);
+};
+
+} // namespace a11y
+} // namespace mozilla
+
+#endif