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 "RenderElement.h"
#include "ScrollView.h"
#include "Widget.h"
namespace WebCore {
AccessibilityScrollView::AccessibilityScrollView(ScrollView* view)
: m_scrollView(view)
, m_childrenDirty(false)
{
}
AccessibilityScrollView::~AccessibilityScrollView()
{
ASSERT(isDetached());
}
void AccessibilityScrollView::detach(AccessibilityDetachmentType detachmentType, AXObjectCache* cache)
{
AccessibilityObject::detach(detachmentType, cache);
m_scrollView = nullptr;
}
Ref<AccessibilityScrollView> AccessibilityScrollView::create(ScrollView* view)
{
return adoptRef(*new AccessibilityScrollView(view));
}
AccessibilityObject* AccessibilityScrollView::scrollBar(AccessibilityOrientation orientation)
{
updateScrollbars();
switch (orientation) {
case AccessibilityOrientationUndefined:
case AccessibilityOrientationVertical:
return m_verticalScrollbar ? m_verticalScrollbar.get() : nullptr;
case AccessibilityOrientationHorizontal:
return m_horizontalScrollbar ? m_horizontalScrollbar.get() : nullptr;
}
return nullptr;
}
bool AccessibilityScrollView::isAttachment() const
{
return m_scrollView && m_scrollView->platformWidget();
}
Widget* AccessibilityScrollView::widgetForAttachmentView() const
{
return m_scrollView;
}
bool AccessibilityScrollView::canSetFocusAttribute() const
{
AccessibilityObject* webArea = webAreaObject();
return webArea && webArea->canSetFocusAttribute();
}
bool AccessibilityScrollView::isFocused() const
{
AccessibilityObject* webArea = webAreaObject();
return webArea && webArea->isFocused();
}
void AccessibilityScrollView::setFocused(bool focused)
{
if (AccessibilityObject* webArea = webAreaObject())
webArea->setFocused(focused);
}
void AccessibilityScrollView::updateChildrenIfNecessary()
{
clearChildren();
addChildren();
}
void AccessibilityScrollView::updateScrollbars()
{
if (!m_scrollView)
return;
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 = nullptr;
}
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 = nullptr;
}
}
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 nullptr;
AXObjectCache* cache = axObjectCache();
if (!cache)
return nullptr;
auto& scrollBarObject = downcast<AccessibilityScrollbar>(*cache->getOrCreate(scrollbar));
scrollBarObject.setParent(this);
m_children.append(&scrollBarObject);
return &scrollBarObject;
}
void AccessibilityScrollView::clearChildren()
{
AccessibilityObject::clearChildren();
m_verticalScrollbar = nullptr;
m_horizontalScrollbar = nullptr;
}
bool AccessibilityScrollView::computeAccessibilityIsIgnored() 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 (!is<FrameView>(m_scrollView))
return nullptr;
Document* document = downcast<FrameView>(*m_scrollView).frame().document();
if (!document || !document->hasLivingRenderTree())
return nullptr;
if (AXObjectCache* cache = axObjectCache())
return cache->getOrCreate(document);
return nullptr;
}
AccessibilityObject* AccessibilityScrollView::accessibilityHitTest(const IntPoint& point) const
{
AccessibilityObject* webArea = webAreaObject();
if (!webArea)
return nullptr;
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
{
if (!m_scrollView)
return LayoutRect();
LayoutRect rect = m_scrollView->frameRect();
float topContentInset = m_scrollView->topContentInset();
rect.move(0, topContentInset);
rect.contract(0, topContentInset);
return rect;
}
FrameView* AccessibilityScrollView::documentFrameView() const
{
if (!is<FrameView>(m_scrollView))
return nullptr;
return downcast<FrameView>(m_scrollView);
}
AccessibilityObject* AccessibilityScrollView::parentObject() const
{
if (!is<FrameView>(m_scrollView))
return nullptr;
AXObjectCache* cache = axObjectCache();
if (!cache)
return nullptr;
HTMLFrameOwnerElement* owner = downcast<FrameView>(*m_scrollView).frame().ownerElement();
if (owner && owner->renderer())
return cache->getOrCreate(owner);
return nullptr;
}
AccessibilityObject* AccessibilityScrollView::parentObjectIfExists() const
{
if (!is<FrameView>(m_scrollView))
return nullptr;
AXObjectCache* cache = axObjectCache();
if (!cache)
return nullptr;
HTMLFrameOwnerElement* owner = downcast<FrameView>(m_scrollView)->frame().ownerElement();
if (owner && owner->renderer())
return cache->get(owner);
return nullptr;
}
ScrollableArea* AccessibilityScrollView::getScrollableAreaIfScrollable() const
{
return m_scrollView;
}
void AccessibilityScrollView::scrollTo(const IntPoint& point) const
{
if (m_scrollView)
m_scrollView->setScrollPosition(point);
}
}