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+// Copyright (c) 2006-2008 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 CHROME_VIEWS_ACCESSIBILITY_VIEW_ACCESSIBILITY_WRAPPER_H_
+#define CHROME_VIEWS_ACCESSIBILITY_VIEW_ACCESSIBILITY_WRAPPER_H_
+
+#include <atlcomcli.h>
+#include <oleacc.h>
+
+#include "base/basictypes.h"
+
+namespace views {
+class View;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ViewAccessibilityWrapper
+//
+// Wrapper class for returning a pointer to the appropriate (platform-specific)
+// accessibility interface for a given View. Needed to keep platform-specific
+// code out of the View class, when answering calls for child/parent IAccessible
+// implementations, for instance.
+//
+////////////////////////////////////////////////////////////////////////////////
+class ViewAccessibilityWrapper {
+ public:
+ explicit ViewAccessibilityWrapper(views::View* view);
+ ~ViewAccessibilityWrapper() {}
+
+ STDMETHODIMP CreateDefaultInstance(REFIID iid);
+
+ // Returns a pointer to a specified interface on an object to which a client
+ // currently holds an interface pointer. If pointer exists, it is reused,
+ // otherwise a new pointer is created. Used by accessibility implementation to
+ // retrieve MSAA implementation for child or parent, when navigating MSAA
+ // hierarchy.
+ STDMETHODIMP GetInstance(REFIID iid, void** interface_ptr);
+
+ // Sets the accessibility interface implementation of this wrapper to be
+ // anything the user specifies.
+ STDMETHODIMP SetInstance(IAccessible* interface_ptr);
+
+ private:
+ // Instance of accessibility information and handling for a View.
+ CComPtr<IAccessible> accessibility_info_;
+
+ // View needed to initialize IAccessible.
+ views::View* view_;
+
+ DISALLOW_COPY_AND_ASSIGN(ViewAccessibilityWrapper);
+};
+
+#endif // CHROME_VIEWS_ACCESSIBILITY_VIEW_ACCESSIBILITY_WRAPPER_H_