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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_BROWSER_ACCESSIBILITY_AUTOCOMPLETE_ACCESSIBILITY_H__
#define CHROME_BROWSER_ACCESSIBILITY_AUTOCOMPLETE_ACCESSIBILITY_H__
#include <atlbase.h>
#include <atlcom.h>
#include <oleacc.h>
#include "chrome/browser/autocomplete/autocomplete_edit.h"
#include "chrome/views/view.h"
////////////////////////////////////////////////////////////////////////////////
//
// AutocompleteAccessibility
//
// Class implementing the MSAA IAccessible COM interface for AutocompleteEdit,
// providing accessibility to be used by screen readers and other assistive
// technology (AT).
//
////////////////////////////////////////////////////////////////////////////////
class ATL_NO_VTABLE AutocompleteAccessibility
: public CComObjectRootEx<CComMultiThreadModel>,
public IDispatchImpl<IAccessible, &IID_IAccessible, &LIBID_Accessibility> {
public:
BEGIN_COM_MAP(AutocompleteAccessibility)
COM_INTERFACE_ENTRY2(IDispatch, IAccessible)
COM_INTERFACE_ENTRY(IAccessible)
END_COM_MAP()
AutocompleteAccessibility() {}
~AutocompleteAccessibility() {}
HRESULT Initialize(const AutocompleteEdit* edit_box);
// Supported IAccessible methods.
// Retrieves the number of accessible children.
STDMETHODIMP get_accChildCount(LONG* child_count);
// Retrieves an IDispatch interface pointer for the specified child.
STDMETHODIMP get_accChild(VARIANT var_child, IDispatch** disp_child);
// Retrieves the IDispatch interface of the object's parent.
STDMETHODIMP get_accParent(IDispatch** disp_parent);
// Traverses to another UI element and retrieves the object.
STDMETHODIMP accNavigate(LONG nav_dir, VARIANT start, VARIANT* end);
// Retrieves the object that has the keyboard focus.
STDMETHODIMP get_accFocus(VARIANT* focus_child);
// Retrieves the name of the specified object.
STDMETHODIMP get_accName(VARIANT var_id, BSTR* name);
// Retrieves the tooltip description.
STDMETHODIMP get_accDescription(VARIANT var_id, BSTR* desc);
// Returns the current value of the edit box.
STDMETHODIMP get_accValue(VARIANT var_id, BSTR* value);
// Retrieves the current state of the specified object.
STDMETHODIMP get_accState(VARIANT var_id, VARIANT* state);
// Retrieves information describing the role of the specified object.
STDMETHODIMP get_accRole(VARIANT var_id, VARIANT* role);
// Retrieves a string that describes the object's default action.
STDMETHODIMP get_accDefaultAction(VARIANT var_id, BSTR* default_action);
// Retrieves the specified object's current screen location.
STDMETHODIMP accLocation(LONG* x_left, LONG* y_top, LONG* width, LONG* height,
VARIANT var_id);
// Retrieves the child element or child object at a given point on the screen.
STDMETHODIMP accHitTest(LONG x_left, LONG y_top, VARIANT* child);
// Retrieves the specified object's shortcut.
STDMETHODIMP get_accKeyboardShortcut(VARIANT var_id, BSTR* access_key);
// Non-supported IAccessible methods.
// Out-dated and can be safely said to be very rarely used.
STDMETHODIMP accDoDefaultAction(VARIANT var_id);
// Selections not applicable to views.
STDMETHODIMP get_accSelection(VARIANT* selected);
STDMETHODIMP accSelect(LONG flags_sel, VARIANT var_id);
// Help functions not supported.
STDMETHODIMP get_accHelp(VARIANT var_id, BSTR* help);
STDMETHODIMP get_accHelpTopic(BSTR* help_file, VARIANT var_id,
LONG* topic_id);
// Deprecated functions, not implemented here.
STDMETHODIMP put_accName(VARIANT var_id, BSTR put_name);
STDMETHODIMP put_accValue(VARIANT var_id, BSTR put_val);
protected:
// A pointer containing the Windows' default IAccessible implementation for
// this object. Used where it is acceptable to return default MSAA
// information.
CComPtr<IAccessible> default_accessibility_server_;
private:
const AutocompleteEdit* edit_box_;
DISALLOW_EVIL_CONSTRUCTORS(AutocompleteAccessibility);
};
#endif // CHROME_BROWSER_ACCESSIBILITY_AUTOCOMPLETE_ACCESSIBILITY_H__
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