1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
// 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_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_ACCESSIBILITY_H_
#define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_ACCESSIBILITY_H_
#pragma once
#include <atlbase.h>
#include <atlcom.h>
#include <oleacc.h>
#include "base/basictypes.h"
#include "base/scoped_comptr_win.h"
class AutocompleteEditViewWin;
////////////////////////////////////////////////////////////////////////////////
//
// AutocompleteAccessibility
//
// Class implementing the MSAA IAccessible COM interface for
// AutocompleteEditViewWin, 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 AutocompleteEditViewWin* 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.
ScopedComPtr<IAccessible> default_accessibility_server_;
private:
const AutocompleteEditViewWin* edit_box_;
DISALLOW_COPY_AND_ASSIGN(AutocompleteAccessibility);
};
#endif // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_ACCESSIBILITY_H_
|
