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/*
* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2012 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 "RenderObject.h"
#import "WebAccessibilityObjectWrapperMac.h"
#import "WebCoreSystemInterface.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->setWrapper(0);
}
void AXObjectCache::attachWrapper(AccessibilityObject* obj)
{
RetainPtr<WebAccessibilityObjectWrapper> wrapper = adoptNS([[WebAccessibilityObjectWrapper alloc] initWithAccessibilityObject:obj]);
obj->setWrapper(wrapper.get());
}
void AXObjectCache::postPlatformNotification(AccessibilityObject* obj, AXNotification notification)
{
if (!obj)
return;
// Some notifications are unique to Safari and do not have NSAccessibility equivalents.
NSString *macNotification;
switch (notification) {
case AXActiveDescendantChanged:
// An active descendant change for trees means a selected rows change.
if (obj->isTree())
macNotification = NSAccessibilitySelectedRowsChangedNotification;
// When a combobox uses active descendant, it means the selected item in its associated
// list has changed. In these cases we should use selected children changed, because
// we don't want the focus to change away from the combobox where the user is typing.
else if (obj->isComboBox())
macNotification = NSAccessibilitySelectedChildrenChangedNotification;
else
macNotification = NSAccessibilityFocusedUIElementChangedNotification;
break;
case AXAutocorrectionOccured:
macNotification = @"AXAutocorrectionOccurred";
break;
case AXFocusedUIElementChanged:
macNotification = NSAccessibilityFocusedUIElementChangedNotification;
break;
case AXLayoutComplete:
macNotification = @"AXLayoutComplete";
break;
case AXLoadComplete:
macNotification = @"AXLoadComplete";
break;
case AXInvalidStatusChanged:
macNotification = @"AXInvalidStatusChanged";
break;
case AXSelectedChildrenChanged:
if (obj->isAccessibilityTable())
macNotification = NSAccessibilitySelectedRowsChangedNotification;
else
macNotification = NSAccessibilitySelectedChildrenChangedNotification;
break;
case AXSelectedTextChanged:
macNotification = NSAccessibilitySelectedTextChangedNotification;
break;
case AXValueChanged:
macNotification = NSAccessibilityValueChangedNotification;
break;
case AXLiveRegionChanged:
macNotification = NSAccessibilityLiveRegionChangedNotification;
break;
case AXRowCountChanged:
macNotification = NSAccessibilityRowCountChangedNotification;
break;
case AXRowExpanded:
macNotification = NSAccessibilityRowExpandedNotification;
break;
case AXRowCollapsed:
macNotification = NSAccessibilityRowCollapsedNotification;
break;
// Does not exist on Mac.
case AXCheckedStateChanged:
default:
return;
}
// NSAccessibilityPostNotification will call this method, (but not when running DRT), so ASSERT here to make sure it does not crash.
// https://bugs.webkit.org/show_bug.cgi?id=46662
ASSERT([obj->wrapper() accessibilityIsIgnored] || true);
NSAccessibilityPostNotification(obj->wrapper(), macNotification);
// Used by DRT to know when notifications are posted.
[obj->wrapper() accessibilityPostedNotification:macNotification];
}
void AXObjectCache::nodeTextChangePlatformNotification(AccessibilityObject*, AXTextChange, unsigned, const String&)
{
}
void AXObjectCache::frameLoadingEventPlatformNotification(AccessibilityObject*, AXLoadingEvent)
{
}
void AXObjectCache::handleFocusedUIElementChanged(Node*, Node*)
{
wkAccessibilityHandleFocusChanged();
}
void AXObjectCache::handleScrolledToAnchor(const Node*)
{
}
}
#endif // HAVE(ACCESSIBILITY)
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