1 /*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "AccessibilityController.h"
28
29 #include "AccessibilityUIElement.h"
30 #include "DumpRenderTree.h"
31 #include <JavaScriptCore/Assertions.h>
32 #include <WebCore/COMPtr.h>
33 #include <WebKit/WebKit.h>
34 #include <oleacc.h>
35
AccessibilityController()36 AccessibilityController::AccessibilityController()
37 {
38 }
39
~AccessibilityController()40 AccessibilityController::~AccessibilityController()
41 {
42 }
43
focusedElement()44 AccessibilityUIElement AccessibilityController::focusedElement()
45 {
46 COMPtr<IAccessible> rootAccessible = rootElement().platformUIElement();
47
48 VARIANT vFocus;
49 if (FAILED(rootAccessible->get_accFocus(&vFocus)))
50 return 0;
51
52 if (V_VT(&vFocus) == VT_I4) {
53 ASSERT(V_I4(&vFocus) == CHILDID_SELF);
54 // The root accessible object is the focused object.
55 return rootAccessible;
56 }
57
58 ASSERT(V_VT(&vFocus) == VT_DISPATCH);
59 // We have an IDispatch; query for IAccessible.
60 return COMPtr<IAccessible>(Query, V_DISPATCH(&vFocus));
61 }
62
rootElement()63 AccessibilityUIElement AccessibilityController::rootElement()
64 {
65 COMPtr<IWebView> view;
66 if (FAILED(frame->webView(&view)))
67 return 0;
68
69 COMPtr<IWebViewPrivate> viewPrivate(Query, view);
70 if (!viewPrivate)
71 return 0;
72
73 HWND webViewWindow;
74 if (FAILED(viewPrivate->viewWindow((OLE_HANDLE*)&webViewWindow)))
75 return 0;
76
77 // Get the root accessible object by querying for the accessible object for the
78 // WebView's window.
79 COMPtr<IAccessible> rootAccessible;
80 if (FAILED(AccessibleObjectFromWindow(webViewWindow, static_cast<DWORD>(OBJID_CLIENT), __uuidof(IAccessible), reinterpret_cast<void**>(&rootAccessible))))
81 return 0;
82
83 return rootAccessible;
84 }
85