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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 VIEWS_ACCESSIBILITY_VIEW_ACCESSIBILITY_WRAPPER_H_
#define VIEWS_ACCESSIBILITY_VIEW_ACCESSIBILITY_WRAPPER_H_
#pragma once
#include <atlcomcli.h>
// Necessary to define OleAcc GUID's used in window_win.cc.
#include <initguid.h>
#include <oleacc.h>
#include "base/basictypes.h"
#include "base/scoped_comptr_win.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);
HRESULT Uninitialize();
// 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.
ScopedComPtr<IAccessible> accessibility_info_;
// View needed to initialize IAccessible.
views::View* view_;
DISALLOW_COPY_AND_ASSIGN(ViewAccessibilityWrapper);
};
#endif // VIEWS_ACCESSIBILITY_VIEW_ACCESSIBILITY_WRAPPER_H_
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