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      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 
     38 class AccessibilityController {
     39 public:
     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     AccessibilityUIElement elementAtPoint(int x, int y);
     49 
     50     void setLogFocusEvents(bool);
     51     void setLogValueChangeEvents(bool);
     52     void setLogScrollingStartEvents(bool);
     53     void setLogAccessibilityEvents(bool);
     54 
     55     void resetToConsistentState();
     56 
     57     void addNotificationListener(PlatformUIElement, JSObjectRef functionCallback);
     58     void notificationReceived(PlatformUIElement, const std::string& eventName);
     59 
     60 private:
     61     static JSClassRef getJSClass();
     62 
     63 #if PLATFORM(WIN)
     64     HWINEVENTHOOK m_focusEventHook;
     65     HWINEVENTHOOK m_valueChangeEventHook;
     66     HWINEVENTHOOK m_scrollingStartEventHook;
     67 
     68     HWINEVENTHOOK m_allEventsHook;
     69     HashMap<PlatformUIElement, JSObjectRef> m_notificationListeners;
     70 #endif
     71 };
     72 
     73 #endif // AccessibilityController_h
     74