1/*
2 * Copyright (C) 2008, 2009, 2010 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#ifndef AccessibilityController_h
27#define AccessibilityController_h
28
29#include "AccessibilityUIElement.h"
30#include <JavaScriptCore/JSObjectRef.h>
31#include <string>
32#include <wtf/HashMap.h>
33#include <wtf/Platform.h>
34#if PLATFORM(WIN)
35#include <windows.h>
36#endif
37
38class AccessibilityController {
39public:
40    AccessibilityController();
41    ~AccessibilityController();
42
43    void makeWindowObject(JSContextRef context, JSObjectRef windowObject, JSValueRef* exception);
44
45    // Controller Methods - platform-independent implementations
46    AccessibilityUIElement rootElement();
47    AccessibilityUIElement focusedElement();
48
49    void setLogFocusEvents(bool);
50    void setLogValueChangeEvents(bool);
51    void setLogScrollingStartEvents(bool);
52
53    void resetToConsistentState();
54
55    void addNotificationListener(PlatformUIElement, JSObjectRef functionCallback);
56    void notificationReceived(PlatformUIElement, const std::string& eventName);
57
58private:
59    static JSClassRef getJSClass();
60
61#if PLATFORM(WIN)
62    HWINEVENTHOOK m_focusEventHook;
63    HWINEVENTHOOK m_valueChangeEventHook;
64    HWINEVENTHOOK m_scrollingStartEventHook;
65
66    HWINEVENTHOOK m_allEventsHook;
67    HashMap<PlatformUIElement, JSObjectRef> m_notificationListeners;
68#endif
69};
70
71#endif // AccessibilityController_h
72