/*

 * Copyright (C) 2003, 2004, 2005, 2006, 2008 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 COMPUTER, 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 COMPUTER, 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.

 */

#import "config.h"

#import "AXObjectCache.h"

#if HAVE(ACCESSIBILITY)

#import "AccessibilityObject.h"

#import "AccessibilityObjectWrapper.h"

#import "RenderObject.h"

#import "WebCoreViewFactory.h"

#import <wtf/PassRefPtr.h>

#ifndef NSAccessibilityLiveRegionChangedNotification

#define NSAccessibilityLiveRegionChangedNotification @"AXLiveRegionChanged"

#endif

// The simple Cocoa calls in this file don't throw exceptions.

namespace WebCore {

void AXObjectCache::detachWrapper(AccessibilityObject* obj)

{

    [obj->wrapper() detach];

    [obj->wrapper() release];

    obj->setWrapper(0);

}

void AXObjectCache::attachWrapper(AccessibilityObject* obj)

{

    obj->setWrapper([[AccessibilityObjectWrapper alloc] initWithAccessibilityObject:obj]);

}

void AXObjectCache::postPlatformNotification(AccessibilityObject* obj, AXNotification notification)

{

    if (!obj)

        return;

    // Some notifications are unique to Safari and do not have NSAccessibility equivalents.

    String macNotification;

    switch (notification) {

        case AXActiveDescendantChanged:

            // An active descendant change for trees means a selected rows change.

            if (obj->isTree())

                macNotification = NSAccessibilitySelectedRowsChangedNotification;

            else

                macNotification = NSAccessibilityFocusedUIElementChangedNotification;                

            break;

        case AXFocusedUIElementChanged:

            macNotification = NSAccessibilityFocusedUIElementChangedNotification;

            break;

        case AXLayoutComplete:

            macNotification = "AXLayoutComplete";

            break;

        case AXLoadComplete:

            macNotification = "AXLoadComplete";

            break;

        case AXSelectedChildrenChanged:

            macNotification = NSAccessibilitySelectedChildrenChangedNotification;

            break;

        case AXSelectedTextChanged:

            macNotification = NSAccessibilitySelectedTextChangedNotification;

            break;

        case AXValueChanged:

            macNotification = NSAccessibilityValueChangedNotification;

            break;

        case AXLiveRegionChanged:

            macNotification = NSAccessibilityLiveRegionChangedNotification;

            break;

        case AXRowCountChanged:

            macNotification = NSAccessibilityRowCountChangedNotification;

            break;

#if !defined(BUILDING_ON_TIGER) && !defined(BUILDING_ON_LEOPARD)

        case AXRowExpanded:

            macNotification = NSAccessibilityRowExpandedNotification;

            break;

        case AXRowCollapsed:

            macNotification = NSAccessibilityRowCollapsedNotification;

            break;

#endif

            // Does not exist on Mac.

        case AXCheckedStateChanged:

        default:

            return;

    }

    NSAccessibilityPostNotification(obj->wrapper(), macNotification);

    // Used by DRT to know when notifications are posted.

    [obj->wrapper() accessibilityPostedNotification:macNotification];

}

void AXObjectCache::handleFocusedUIElementChanged(RenderObject*, RenderObject*)

{

    [[WebCoreViewFactory sharedFactory] accessibilityHandleFocusChanged];

}

void AXObjectCache::handleScrolledToAnchor(const Node*)

{

}

}

#endif // HAVE(ACCESSIBILITY)