AXObject* AXObjectCache::focusedUIElementForPage(const Page* page)
{
if (!gAccessibilityEnabled)
return 0;
// get the focused node in the page
Document* focusedDocument = page->focusController().focusedOrMainFrame()->document();
Node* focusedNode = focusedDocument->focusedElement();
if (!focusedNode)
focusedNode = focusedDocument;
if (focusedNode->hasTagName(areaTag))
return focusedImageMapUIElement(toHTMLAreaElement(focusedNode));
AXObject* obj = focusedNode->document().axObjectCache()->getOrCreate(focusedNode);
if (!obj)
return 0;
if (obj->shouldFocusActiveDescendant()) {
if (AXObject* descendant = obj->activeDescendant())
obj = descendant;
}
// the HTML element, for example, is focusable but has an AX object that is ignored
if (obj->accessibilityIsIgnored())
obj = obj->parentObjectUnignored();
return obj;
}
AXObject* AXListBox::elementAccessibilityHitTest(const IntPoint& point) const
{
// the internal HTMLSelectElement methods for returning a listbox option at a point
// ignore optgroup elements.
if (!m_renderer)
return 0;
Node* node = m_renderer->node();
if (!node)
return 0;
LayoutRect parentRect = elementRect();
AXObject* listBoxOption = 0;
unsigned length = m_children.size();
for (unsigned i = 0; i < length; i++) {
LayoutRect rect = toRenderListBox(m_renderer)->itemBoundingBoxRect(parentRect.location(), i);
// The cast to HTMLElement below is safe because the only other possible listItem type
// would be a WMLElement, but WML builds don't use accessibility features at all.
if (rect.contains(point)) {
listBoxOption = m_children[i].get();
break;
}
}
if (listBoxOption && !listBoxOption->accessibilityIsIgnored())
return listBoxOption;
return axObjectCache()->getOrCreate(m_renderer);
}
AXObject* AXObjectCacheImpl::focusedUIElementForPage(const Page* page)
{
if (!page->settings().accessibilityEnabled())
return 0;
// Cross-process accessibility is not yet implemented.
if (!page->focusController().focusedOrMainFrame()->isLocalFrame())
return 0;
// get the focused node in the page
Document* focusedDocument = toLocalFrame(page->focusController().focusedOrMainFrame())->document();
Node* focusedNode = focusedDocument->focusedElement();
if (!focusedNode)
focusedNode = focusedDocument;
if (isHTMLAreaElement(*focusedNode))
return focusedImageMapUIElement(toHTMLAreaElement(focusedNode));
AXObject* obj = toAXObjectCacheImpl(focusedNode->document().axObjectCache())->getOrCreate(focusedNode);
if (!obj)
return 0;
if (obj->shouldFocusActiveDescendant()) {
if (AXObject* descendant = obj->activeDescendant())
obj = descendant;
}
// the HTML element, for example, is focusable but has an AX object that is ignored
if (obj->accessibilityIsIgnored())
obj = obj->parentObjectUnignored();
return obj;
}
void InspectorAccessibilityAgent::getAXNode(ErrorString* errorString, int nodeId, RefPtr<AXNode>& accessibilityNode)
{
Frame* mainFrame = m_page->mainFrame();
if (!mainFrame->isLocalFrame()) {
*errorString = "Can't inspect out of process frames yet";
return;
}
InspectorDOMAgent* domAgent = toLocalFrame(mainFrame)->instrumentingAgents()->inspectorDOMAgent();
if (!domAgent) {
*errorString = "DOM agent must be enabled";
return;
}
Node* node = domAgent->assertNode(errorString, nodeId);
if (!node)
return;
Document& document = node->document();
OwnPtr<ScopedAXObjectCache> cache = ScopedAXObjectCache::create(document);
AXObjectCacheImpl* cacheImpl = toAXObjectCacheImpl(cache->get());
AXObject* axObject = cacheImpl->getOrCreate(node);
if (!axObject || axObject->accessibilityIsIgnored()) {
accessibilityNode = buildObjectForIgnoredNode(node, axObject, cacheImpl);
return;
}
RefPtr<TypeBuilder::Array<AXProperty>> properties = TypeBuilder::Array<AXProperty>::create();
fillLiveRegionProperties(axObject, properties);
fillGlobalStates(axObject, properties);
fillWidgetProperties(axObject, properties);
fillWidgetStates(axObject, properties);
fillRelationships(axObject, properties);
accessibilityNode = buildObjectForNode(node, axObject, cacheImpl, properties);
}
bool AXScrollView::computeAccessibilityIsIgnored() const
{
AXObject* webArea = webAreaObject();
if (!webArea)
return true;
return webArea->accessibilityIsIgnored();
}
AXObject* AXObject::parentObjectUnignored() const
{
AXObject* parent;
for (parent = parentObject(); parent && parent->accessibilityIsIgnored(); parent = parent->parentObject()) {
}
return parent;
}
void AXScrollView::addChildren()
{
ASSERT(!m_haveChildren);
m_haveChildren = true;
AXObject* webArea = webAreaObject();
if (webArea && !webArea->accessibilityIsIgnored())
m_children.append(webArea);
updateScrollbars();
}
bool AXInlineTextBox::computeAccessibilityIsIgnored(IgnoredReasons* ignoredReasons) const
{
AXObject* parent = parentObject();
if (!parent)
return false;
if (!parent->accessibilityIsIgnored())
return false;
if (ignoredReasons)
parent->computeAccessibilityIsIgnored(ignoredReasons);
return true;
}
void AXARIAGrid::addChildren()
{
ASSERT(!m_haveChildren);
if (!isAXTable()) {
AXRenderObject::addChildren();
return;
}
m_haveChildren = true;
if (!m_renderer)
return;
AXObjectCache* axCache = m_renderer->document().axObjectCache();
// add only rows that are labeled as aria rows
HashSet<AXObject*> appendedRows;
unsigned columnCount = 0;
for (RefPtr<AXObject> child = firstChild(); child; child = child->nextSibling()) {
if (!addTableCellChild(child.get(), appendedRows, columnCount)) {
// in case the render tree doesn't match the expected ARIA hierarchy, look at the children
if (!child->hasChildren())
child->addChildren();
// The children of this non-row will contain all non-ignored elements (recursing to find them).
// This allows the table to dive arbitrarily deep to find the rows.
AccessibilityChildrenVector children = child->children();
size_t length = children.size();
for (size_t i = 0; i < length; ++i)
addTableCellChild(children[i].get(), appendedRows, columnCount);
}
}
// make the columns based on the number of columns in the first body
for (unsigned i = 0; i < columnCount; ++i) {
AXTableColumn* column = toAXTableColumn(axCache->getOrCreate(ColumnRole));
column->setColumnIndex((int)i);
column->setParent(this);
m_columns.append(column);
if (!column->accessibilityIsIgnored())
m_children.append(column);
}
AXObject* headerContainerObject = headerContainer();
if (headerContainerObject && !headerContainerObject->accessibilityIsIgnored())
m_children.append(headerContainerObject);
}
AXObject* AXObjectCacheImpl::focusedObject()
{
if (!accessibilityEnabled())
return 0;
// We don't have to return anything if the focused frame is not local;
// the remote frame will have its own AXObjectCacheImpl and the focused
// object will be sorted out by the browser process.
Page* page = m_document->page();
if (!page->focusController().focusedFrame())
return 0;
// Get the focused node in the page.
Document* focusedDocument = page->focusController().focusedFrame()->document();
Node* focusedNode = focusedDocument->focusedElement();
if (!focusedNode)
focusedNode = focusedDocument;
// If it's an image map, get the focused link within the image map.
if (isHTMLAreaElement(focusedNode))
return focusedImageMapUIElement(toHTMLAreaElement(focusedNode));
// See if there's a page popup, for example a calendar picker.
Element* adjustedFocusedElement = focusedDocument->adjustedFocusedElement();
if (isHTMLInputElement(adjustedFocusedElement)) {
if (AXObject* axPopup = toHTMLInputElement(adjustedFocusedElement)->popupRootAXObject()) {
if (Element* focusedElementInPopup = axPopup->document()->focusedElement())
focusedNode = focusedElementInPopup;
}
}
AXObject* obj = getOrCreate(focusedNode);
if (!obj)
return 0;
if (obj->shouldFocusActiveDescendant()) {
if (AXObject* descendant = obj->activeDescendant())
obj = descendant;
}
// the HTML element, for example, is focusable but has an AX object that is ignored
if (obj->accessibilityIsIgnored())
obj = obj->parentObjectUnignored();
return obj;
}
void AXListBox::addChildren()
{
Node* selectNode = m_renderer->node();
if (!selectNode)
return;
m_haveChildren = true;
const Vector<HTMLElement*>& listItems = toHTMLSelectElement(selectNode)->listItems();
unsigned length = listItems.size();
for (unsigned i = 0; i < length; i++) {
// The cast to HTMLElement below is safe because the only other possible listItem type
// would be a WMLElement, but WML builds don't use accessibility features at all.
AXObject* listOption = listBoxOptionAXObject(listItems[i]);
if (listOption && !listOption->accessibilityIsIgnored())
m_children.append(listOption);
}
}
AXObject* AXObjectCacheImpl::firstAccessibleObjectFromNode(const Node* node)
{
if (!node)
return 0;
AXObject* accessibleObject = getOrCreate(node->layoutObject());
while (accessibleObject && accessibleObject->accessibilityIsIgnored()) {
node = NodeTraversal::next(*node);
while (node && !node->layoutObject())
node = NodeTraversal::nextSkippingChildren(*node);
if (!node)
return 0;
accessibleObject = getOrCreate(node->layoutObject());
}
return accessibleObject;
}
AXObject* AXObject::firstAccessibleObjectFromNode(const Node* node)
{
if (!node)
return 0;
AXObjectCache* cache = node->document().axObjectCache();
AXObject* accessibleObject = cache->getOrCreate(node->renderer());
while (accessibleObject && accessibleObject->accessibilityIsIgnored()) {
node = NodeTraversal::next(*node);
while (node && !node->renderer())
node = NodeTraversal::nextSkippingChildren(*node);
if (!node)
return 0;
accessibleObject = cache->getOrCreate(node->renderer());
}
return accessibleObject;
}
AXObject* AXObjectCacheImpl::getOrCreate(LayoutObject* layoutObject)
{
if (!layoutObject)
return 0;
if (AXObject* obj = get(layoutObject))
return obj;
AXObject* newObj = createFromRenderer(layoutObject);
// Will crash later if we have two objects for the same layoutObject.
ASSERT(!get(layoutObject));
getAXID(newObj);
m_layoutObjectMapping.set(layoutObject, newObj->axObjectID());
m_objects.set(newObj->axObjectID(), newObj);
newObj->init();
newObj->setLastKnownIsIgnoredValue(newObj->accessibilityIsIgnored());
return newObj;
}
AXObject* AXObjectCacheImpl::getOrCreate(AbstractInlineTextBox* inlineTextBox)
{
if (!inlineTextBox)
return 0;
if (AXObject* obj = get(inlineTextBox))
return obj;
AXObject* newObj = createFromInlineTextBox(inlineTextBox);
// Will crash later if we have two objects for the same inlineTextBox.
ASSERT(!get(inlineTextBox));
getAXID(newObj);
m_inlineTextBoxObjectMapping.set(inlineTextBox, newObj->axObjectID());
m_objects.set(newObj->axObjectID(), newObj);
newObj->init();
newObj->setLastKnownIsIgnoredValue(newObj->accessibilityIsIgnored());
return newObj;
}
AXObject* AXObjectCacheImpl::getOrCreate(Node* node)
{
if (!node)
return 0;
if (AXObject* obj = get(node))
return obj;
// If the node has a layout object, prefer using that as the primary key for the AXObject,
// with the exception of an HTMLAreaElement, which is created based on its node.
if (node->layoutObject() && !isHTMLAreaElement(node))
return getOrCreate(node->layoutObject());
if (!node->parentElement())
return 0;
if (isHTMLHeadElement(node))
return 0;
AXObject* newObj = createFromNode(node);
// Will crash later if we have two objects for the same node.
ASSERT(!get(node));
getAXID(newObj);
m_nodeObjectMapping.set(node, newObj->axObjectID());
m_objects.set(newObj->axObjectID(), newObj);
newObj->init();
newObj->setLastKnownIsIgnoredValue(newObj->accessibilityIsIgnored());
if (node->isElementNode())
updateTreeIfElementIdIsAriaOwned(toElement(node));
return newObj;
}
void AXTable::addChildren()
{
ASSERT(!isDetached());
if (!isAXTable()) {
AXLayoutObject::addChildren();
return;
}
ASSERT(!m_haveChildren);
m_haveChildren = true;
if (!m_layoutObject || !m_layoutObject->isTable())
return;
LayoutTable* table = toLayoutTable(m_layoutObject);
AXObjectCacheImpl& axCache = axObjectCache();
Node* tableNode = table->node();
if (!isHTMLTableElement(tableNode))
return;
// Add caption
if (HTMLTableCaptionElement* caption = toHTMLTableElement(tableNode)->caption()) {
AXObject* captionObject = axCache.getOrCreate(caption);
if (captionObject && !captionObject->accessibilityIsIgnored())
m_children.append(captionObject);
}
// Go through all the available sections to pull out the rows and add them as children.
table->recalcSectionsIfNeeded();
LayoutTableSection* tableSection = table->topSection();
if (!tableSection)
return;
LayoutTableSection* initialTableSection = tableSection;
while (tableSection) {
HeapHashSet<Member<AXObject>> appendedRows;
unsigned numRows = tableSection->numRows();
for (unsigned rowIndex = 0; rowIndex < numRows; ++rowIndex) {
LayoutTableRow* layoutRow = tableSection->rowLayoutObjectAt(rowIndex);
if (!layoutRow)
continue;
AXObject* rowObject = axCache.getOrCreate(layoutRow);
if (!rowObject || !rowObject->isTableRow())
continue;
AXTableRow* row = toAXTableRow(rowObject);
// We need to check every cell for a new row, because cell spans
// can cause us to miss rows if we just check the first column.
if (appendedRows.contains(row))
continue;
row->setRowIndex(static_cast<int>(m_rows.size()));
m_rows.append(row);
if (!row->accessibilityIsIgnored())
m_children.append(row);
appendedRows.add(row);
}
tableSection = table->sectionBelow(tableSection, SkipEmptySections);
}
// make the columns based on the number of columns in the first body
unsigned length = initialTableSection->numEffectiveColumns();
for (unsigned i = 0; i < length; ++i) {
AXTableColumn* column = toAXTableColumn(axCache.getOrCreate(ColumnRole));
column->setColumnIndex((int)i);
column->setParent(this);
m_columns.append(column);
if (!column->accessibilityIsIgnored())
m_children.append(column);
}
AXObject* headerContainerObject = headerContainer();
if (headerContainerObject && !headerContainerObject->accessibilityIsIgnored())
m_children.append(headerContainerObject);
}
void AXTable::addChildren()
{
if (!isAXTable()) {
AXRenderObject::addChildren();
return;
}
ASSERT(!m_haveChildren);
m_haveChildren = true;
if (!m_renderer || !m_renderer->isTable())
return;
RenderTable* table = toRenderTable(m_renderer);
AXObjectCache* axCache = m_renderer->document().axObjectCache();
// Go through all the available sections to pull out the rows and add them as children.
table->recalcSectionsIfNeeded();
RenderTableSection* tableSection = table->topSection();
if (!tableSection)
return;
RenderTableSection* initialTableSection = tableSection;
while (tableSection) {
HashSet<AXObject*> appendedRows;
unsigned numRows = tableSection->numRows();
for (unsigned rowIndex = 0; rowIndex < numRows; ++rowIndex) {
RenderTableRow* renderRow = tableSection->rowRendererAt(rowIndex);
if (!renderRow)
continue;
AXObject* rowObject = axCache->getOrCreate(renderRow);
if (!rowObject->isTableRow())
continue;
AXTableRow* row = toAXTableRow(rowObject);
// We need to check every cell for a new row, because cell spans
// can cause us to miss rows if we just check the first column.
if (appendedRows.contains(row))
continue;
row->setRowIndex(static_cast<int>(m_rows.size()));
m_rows.append(row);
if (!row->accessibilityIsIgnored())
m_children.append(row);
appendedRows.add(row);
}
tableSection = table->sectionBelow(tableSection, SkipEmptySections);
}
// make the columns based on the number of columns in the first body
unsigned length = initialTableSection->numColumns();
for (unsigned i = 0; i < length; ++i) {
AXTableColumn* column = toAXTableColumn(axCache->getOrCreate(ColumnRole));
column->setColumnIndex((int)i);
column->setParent(this);
m_columns.append(column);
if (!column->accessibilityIsIgnored())
m_children.append(column);
}
AXObject* headerContainerObject = headerContainer();
if (headerContainerObject && !headerContainerObject->accessibilityIsIgnored())
m_children.append(headerContainerObject);
}
void AXObjectCache::notificationPostTimerFired(Timer<AXObjectCache>*)
{
RefPtr<Document> protectorForCacheOwner(m_document);
m_notificationPostTimer.stop();
unsigned i = 0, count = m_notificationsToPost.size();
for (i = 0; i < count; ++i) {
AXObject* obj = m_notificationsToPost[i].first.get();
if (!obj->axObjectID())
continue;
if (!obj->axObjectCache())
continue;
#ifndef NDEBUG
// Make sure none of the render views are in the process of being layed out.
// Notifications should only be sent after the renderer has finished
if (obj->isAXRenderObject()) {
AXRenderObject* renderObj = toAXRenderObject(obj);
RenderObject* renderer = renderObj->renderer();
if (renderer && renderer->view())
ASSERT(!renderer->view()->layoutState());
}
#endif
AXNotification notification = m_notificationsToPost[i].second;
postPlatformNotification(obj, notification);
if (notification == AXChildrenChanged && obj->parentObjectIfExists() && obj->lastKnownIsIgnoredValue() != obj->accessibilityIsIgnored())
childrenChanged(obj->parentObject());
}
m_notificationsToPost.clear();
}
void AXObjectCacheImpl::notificationPostTimerFired(Timer<AXObjectCacheImpl>*)
{
RefPtrWillBeRawPtr<Document> protectorForCacheOwner(m_document.get());
m_notificationPostTimer.stop();
unsigned i = 0, count = m_notificationsToPost.size();
for (i = 0; i < count; ++i) {
AXObject* obj = m_notificationsToPost[i].first;
if (!obj->axObjectID())
continue;
if (obj->isDetached())
continue;
#if ENABLE(ASSERT)
// Make sure none of the layout views are in the process of being layed out.
// Notifications should only be sent after the layoutObject has finished
if (obj->isAXLayoutObject()) {
AXLayoutObject* layoutObj = toAXLayoutObject(obj);
LayoutObject* layoutObject = layoutObj->layoutObject();
if (layoutObject && layoutObject->view())
ASSERT(!layoutObject->view()->layoutState());
}
#endif
AXNotification notification = m_notificationsToPost[i].second;
postPlatformNotification(obj, notification);
if (notification == AXChildrenChanged && obj->parentObjectIfExists() && obj->lastKnownIsIgnoredValue() != obj->accessibilityIsIgnored())
childrenChanged(obj->parentObject());
}
m_notificationsToPost.clear();
}