blob: 683b17d8792a7c7c49730f31c62f677561db36fd [file] [log] [blame]
/*
* Copyright (C) 2008, 2009, 2010, 2013 Apple Inc. All Rights Reserved.
* Copyright (C) 2012 Serotek Corporation. 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.
*/
#include "config.h"
#include "AXObjectCache.h"
#include "AccessibilityObject.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "Document.h"
#include "Page.h"
#include "RenderObject.h"
// Provided by IAccessibleEventID.idl
#define IA2_EVENT_DOCUMENT_LOAD_COMPLETE 261
namespace WebCore {
void AXObjectCache::detachWrapper(AXCoreObject* obj, AccessibilityDetachmentType)
{
// On Windows, AccessibilityObjects are created when get_accChildCount is
// called, but they are not wrapped until get_accChild is called, so this
// object may not have a wrapper.
if (AccessibilityObjectWrapper* wrapper = obj->wrapper())
wrapper->detach();
}
void AXObjectCache::attachWrapper(AXCoreObject*)
{
// On Windows, AccessibilityObjects are wrapped when the accessibility
// software requests them via get_accChild.
}
void AXObjectCache::handleScrolledToAnchor(const Node* anchorNode)
{
// The anchor node may not be accessible. Post the notification for the
// first accessible object.
postPlatformNotification(AccessibilityObject::firstAccessibleObjectFromNode(anchorNode), AXScrolledToAnchor);
}
void AXObjectCache::postPlatformNotification(AXCoreObject* obj, AXNotification notification)
{
if (!obj)
return;
Document* document = obj->document();
if (!document)
return;
Page* page = document->page();
if (!page || !page->chrome().platformPageClient())
return;
DWORD msaaEvent;
switch (notification) {
case AXCheckedStateChanged:
msaaEvent = EVENT_OBJECT_STATECHANGE;
break;
case AXFocusedUIElementChanged:
case AXActiveDescendantChanged:
msaaEvent = EVENT_OBJECT_FOCUS;
break;
case AXScrolledToAnchor:
msaaEvent = EVENT_SYSTEM_SCROLLINGSTART;
break;
case AXLayoutComplete:
msaaEvent = EVENT_OBJECT_REORDER;
break;
case AXLoadComplete:
msaaEvent = IA2_EVENT_DOCUMENT_LOAD_COMPLETE;
break;
case AXValueChanged:
case AXMenuListValueChanged:
msaaEvent = EVENT_OBJECT_VALUECHANGE;
break;
case AXMenuListItemSelected:
msaaEvent = EVENT_OBJECT_SELECTION;
break;
default:
return;
}
// Windows will end up calling get_accChild() on the root accessible
// object for the WebView, passing the child ID that we specify below. We
// negate the AXID so we know that the caller is passing the ID of an
// element, not the index of a child element.
ASSERT(obj->objectID().toUInt64() >= 1);
ASSERT(obj->objectID().toUInt64() <= std::numeric_limits<LONG>::max());
NotifyWinEvent(msaaEvent, page->chrome().platformPageClient(), OBJID_CLIENT, -static_cast<LONG>(obj->objectID().toUInt64()));
}
void AXObjectCache::nodeTextChangePlatformNotification(AccessibilityObject*, AXTextChange, unsigned, const String&)
{
}
void AXObjectCache::frameLoadingEventPlatformNotification(AccessibilityObject* obj, AXLoadingEvent notification)
{
if (!obj)
return;
Document* document = obj->document();
if (!document)
return;
Page* page = document->page();
if (!page)
return;
if (notification == AXLoadingStarted)
page->chrome().client().AXStartFrameLoad();
else if (notification == AXLoadingFinished)
page->chrome().client().AXFinishFrameLoad();
}
AXID AXObjectCache::platformGenerateAXID() const
{
static LONG lastUsedID = 0;
// Generate a new ID. Windows accessibility relies on a positive AXID,
// ranging from 1 to LONG_MAX.
LONG currentID = lastUsedID;
AXID objID;
do {
objID = makeObjectIdentifier<AXIDType>(++currentID);
} while (!objID.isValid() || m_idsInUse.contains(objID));
ASSERT(objID.isValid() && objID.toUInt64() <= std::numeric_limits<LONG>::max());
lastUsedID = currentID;
return objID;
}
void AXObjectCache::platformHandleFocusedUIElementChanged(Node*, Node* newFocusedNode)
{
if (!newFocusedNode)
return;
Page* page = newFocusedNode->document().page();
if (!page || !page->chrome().platformPageClient())
return;
auto* focusedObject = focusedObjectForPage(page);
if (!focusedObject)
return;
ASSERT(!focusedObject->accessibilityIsIgnored());
postPlatformNotification(focusedObject, AXFocusedUIElementChanged);
}
void AXObjectCache::platformPerformDeferredCacheUpdate()
{
}
} // namespace WebCore