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/*
* Copyright (C) 2008, 2009, 2010 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 AccessibilityController_h
#define AccessibilityController_h
#include "AccessibilityUIElement.h"
#include <JavaScriptCore/JSObjectRef.h>
#include <JavaScriptCore/JSRetainPtr.h>
#include <string>
#include <wtf/HashMap.h>
#include <wtf/Platform.h>
#if PLATFORM(WIN)
#include <windows.h>
#endif
#if HAVE(ACCESSIBILITY) && (PLATFORM(GTK) || PLATFORM(EFL))
#include "AccessibilityNotificationHandlerAtk.h"
#include <atk/atk.h>
#endif
class AccessibilityController {
public:
AccessibilityController();
~AccessibilityController();
void makeWindowObject(JSContextRef context, JSObjectRef windowObject, JSValueRef* exception);
// Controller Methods - platform-independent implementations
AccessibilityUIElement rootElement();
AccessibilityUIElement focusedElement();
AccessibilityUIElement elementAtPoint(int x, int y);
AccessibilityUIElement accessibleElementById(JSStringRef id);
void setLogFocusEvents(bool);
void setLogValueChangeEvents(bool);
void setLogScrollingStartEvents(bool);
void setLogAccessibilityEvents(bool);
void resetToConsistentState();
// Global notification listener, captures notifications on any object.
bool addNotificationListener(JSObjectRef functionCallback);
void removeNotificationListener();
// Enhanced accessibility.
void enableEnhancedAccessibility(bool);
bool enhancedAccessibilityEnabled();
JSRetainPtr<JSStringRef> platformName() const;
#if PLATFORM(WIN)
// Helper methods so this class can add the listeners on behalf of AccessibilityUIElement.
void winAddNotificationListener(PlatformUIElement, JSObjectRef functionCallback);
void winNotificationReceived(PlatformUIElement, const std::string& eventName);
#endif
#if HAVE(ACCESSIBILITY) && (PLATFORM(GTK) || PLATFORM(EFL))
AtkObject* childElementById(AtkObject* parent, const char* id);
#endif
private:
static JSClassRef getJSClass();
#if PLATFORM(WIN)
HWINEVENTHOOK m_focusEventHook;
HWINEVENTHOOK m_valueChangeEventHook;
HWINEVENTHOOK m_scrollingStartEventHook;
HWINEVENTHOOK m_allEventsHook;
HWINEVENTHOOK m_notificationsEventHook;
HashMap<PlatformUIElement, JSObjectRef> m_notificationListeners;
#endif
#if PLATFORM(COCOA) || PLATFORM(IOS)
RetainPtr<NotificationHandler> m_globalNotificationHandler;
#endif
#if HAVE(ACCESSIBILITY) && (PLATFORM(GTK) || PLATFORM(EFL))
RefPtr<AccessibilityNotificationHandler> m_globalNotificationHandler;
#endif
void platformResetToConsistentState();
};
#endif // AccessibilityController_h
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