AccessibilityScrollView.cpp [plain text]
#include "config.h"
#include "AccessibilityScrollView.h"
#include "AXObjectCache.h"
#include "AccessibilityScrollbar.h"
#include "Frame.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)
, m_childrenDirty(false)
{
}
PassRefPtr<AccessibilityScrollView> AccessibilityScrollView::create(ScrollView* view)
{
return adoptRef(new AccessibilityScrollView(view));
}
AccessibilityObject* AccessibilityScrollView::scrollBar(AccessibilityOrientation orientation)
{
updateScrollbars();
switch (orientation) {
case AccessibilityOrientationVertical:
return m_verticalScrollbar ? m_verticalScrollbar.get() : 0;
case AccessibilityOrientationHorizontal:
return m_horizontalScrollbar ? m_horizontalScrollbar.get() : 0;
}
return 0;
}
bool AccessibilityScrollView::isAttachment() const
{
return m_scrollView->platformWidget();
}
Widget* AccessibilityScrollView::widgetForAttachmentView() const
{
return m_scrollView.get();
}
void AccessibilityScrollView::updateChildrenIfNecessary()
{
if (m_childrenDirty)
clearChildren();
if (!m_haveChildren)
addChildren();
updateScrollbars();
}
void AccessibilityScrollView::updateScrollbars()
{
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[pos]->detachFromParent();
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::clearChildren()
{
AccessibilityObject::clearChildren();
m_verticalScrollbar = 0;
m_horizontalScrollbar = 0;
}
bool AccessibilityScrollView::accessibilityIsIgnored() const
{
AccessibilityObject* webArea = webAreaObject();
if (!webArea)
return true;
return webArea->accessibilityIsIgnored();
}
void AccessibilityScrollView::addChildren()
{
ASSERT(!m_haveChildren);
m_haveChildren = true;
AccessibilityObject* webArea = webAreaObject();
if (webArea && !webArea->accessibilityIsIgnored())
m_children.append(webArea);
updateScrollbars();
}
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);
}
LayoutRect 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->renderer())
return axObjectCache()->getOrCreate(owner->renderer());
return 0;
}
AccessibilityObject* AccessibilityScrollView::parentObjectIfExists() const
{
if (!m_scrollView->isFrameView())
return 0;
HTMLFrameOwnerElement* owner = static_cast<FrameView*>(m_scrollView.get())->frame()->ownerElement();
if (owner && owner->renderer())
return axObjectCache()->get(owner->renderer());
return 0;
}
ScrollableArea* AccessibilityScrollView::getScrollableAreaIfScrollable() const
{
return m_scrollView.get();
}
void AccessibilityScrollView::scrollTo(const IntPoint& point) const
{
m_scrollView->setScrollPosition(point);
}
}