blob: 5e34f81ce6e6b4c39d421bfd907b83e8983dc166 [file] [log] [blame]
/*
* Copyright (C) 2011 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 AND ITS CONTRIBUTORS "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 OR ITS 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 "AccessibilityScrollView.h"
#include "AXObjectCache.h"
#include "AccessibilityScrollbar.h"
#include "FrameView.h"
#include "HTMLFrameOwnerElement.h"
#include "RenderPart.h"
#include "ScrollView.h"
#include "Widget.h"
namespace WebCore {
AccessibilityScrollView::AccessibilityScrollView(ScrollView* view)
: m_scrollView(view)
{
}
PassRefPtr<AccessibilityScrollView> AccessibilityScrollView::create(ScrollView* view)
{
return adoptRef(new AccessibilityScrollView(view));
}
AccessibilityObject* AccessibilityScrollView::scrollBar(AccessibilityOrientation orientation) const
{
switch (orientation) {
case AccessibilityOrientationVertical:
return m_verticalScrollbar ? m_verticalScrollbar.get() : 0;
case AccessibilityOrientationHorizontal:
return m_horizontalScrollbar ? m_horizontalScrollbar.get() : 0;
}
return 0;
}
const AccessibilityObject::AccessibilityChildrenVector& AccessibilityScrollView::children()
{
if (!m_haveChildren)
addChildren();
return m_children;
}
// If this is WebKit1 then the native scroll view needs to return the
// AX information (because there are no scroll bar children in the ScrollView object in WK1).
// In WebKit2, the ScrollView object will return the AX information (because there are no platform widgets).
bool AccessibilityScrollView::isAttachment() const
{
return m_scrollView->platformWidget();
}
Widget* AccessibilityScrollView::widgetForAttachmentView() const
{
return m_scrollView.get();
}
void AccessibilityScrollView::updateChildrenIfNecessary()
{
if (m_scrollView->horizontalScrollbar() && !m_horizontalScrollbar)
m_horizontalScrollbar = addChildScrollbar(m_scrollView->horizontalScrollbar());
else if (!m_scrollView->horizontalScrollbar() && m_horizontalScrollbar) {
removeChildScrollbar(m_horizontalScrollbar.get());
m_horizontalScrollbar = 0;
}
if (m_scrollView->verticalScrollbar() && !m_verticalScrollbar)
m_verticalScrollbar = addChildScrollbar(m_scrollView->verticalScrollbar());
else if (!m_scrollView->verticalScrollbar() && m_verticalScrollbar) {
removeChildScrollbar(m_verticalScrollbar.get());
m_verticalScrollbar = 0;
}
}
void AccessibilityScrollView::removeChildScrollbar(AccessibilityObject* scrollbar)
{
size_t pos = m_children.find(scrollbar);
if (pos != WTF::notFound)
m_children.remove(pos);
}
AccessibilityScrollbar* AccessibilityScrollView::addChildScrollbar(Scrollbar* scrollbar)
{
if (!scrollbar)
return 0;
AccessibilityScrollbar* scrollBarObject = static_cast<AccessibilityScrollbar*>(axObjectCache()->getOrCreate(scrollbar));
scrollBarObject->setParent(this);
m_children.append(scrollBarObject);
return scrollBarObject;
}
void AccessibilityScrollView::addChildren()
{
ASSERT(!m_haveChildren);
m_haveChildren = true;
AccessibilityObject* webArea = webAreaObject();
if (webArea)
m_children.append(webArea);
updateChildrenIfNecessary();
}
AccessibilityObject* AccessibilityScrollView::webAreaObject() const
{
if (!m_scrollView->isFrameView())
return 0;
Document* doc = static_cast<FrameView*>(m_scrollView.get())->frame()->document();
if (!doc || !doc->renderer())
return 0;
return axObjectCache()->getOrCreate(doc->renderer());
}
AccessibilityObject* AccessibilityScrollView::accessibilityHitTest(const IntPoint& point) const
{
AccessibilityObject* webArea = webAreaObject();
if (!webArea)
return 0;
if (m_horizontalScrollbar && m_horizontalScrollbar->elementRect().contains(point))
return m_horizontalScrollbar.get();
if (m_verticalScrollbar && m_verticalScrollbar->elementRect().contains(point))
return m_verticalScrollbar.get();
return webArea->accessibilityHitTest(point);
}
IntRect AccessibilityScrollView::elementRect() const
{
return m_scrollView->frameRect();
}
FrameView* AccessibilityScrollView::documentFrameView() const
{
if (!m_scrollView->isFrameView())
return 0;
return static_cast<FrameView*>(m_scrollView.get());
}
AccessibilityObject* AccessibilityScrollView::parentObject() const
{
if (!m_scrollView->isFrameView())
return 0;
HTMLFrameOwnerElement* owner = static_cast<FrameView*>(m_scrollView.get())->frame()->ownerElement();
if (owner && owner->renderPart())
return axObjectCache()->getOrCreate(owner->renderPart()->parent());
return 0;
}
} // namespace WebCore