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Diffstat (limited to 'chrome/views/accessibility/view_accessibility_wrapper.h')
-rw-r--r-- | chrome/views/accessibility/view_accessibility_wrapper.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/chrome/views/accessibility/view_accessibility_wrapper.h b/chrome/views/accessibility/view_accessibility_wrapper.h new file mode 100644 index 0000000..6d4a842 --- /dev/null +++ b/chrome/views/accessibility/view_accessibility_wrapper.h @@ -0,0 +1,55 @@ +// 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_ |