Correctly compute parent of AXMenuListOption

third_party/WebKit/Source/modules/accessibility/AXMenuListOption.cpp

 /*
  * Copyright (C) 2010 Apple Inc. All Rights Reserved.
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 #include "modules/accessibility/AXMenuListOption.h"
 
 #include "SkMatrix44.h"
+#include "core/html/HTMLSelectElement.h"
 #include "modules/accessibility/AXMenuListPopup.h"
 #include "modules/accessibility/AXObjectCacheImpl.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 AXMenuListOption::AXMenuListOption(HTMLOptionElement* element,
                                    AXObjectCacheImpl& axObjectCache)
     : AXMockObject(axObjectCache), m_element(element) {}
 
 AXMenuListOption::~AXMenuListOption() {
-  ASSERT(!m_element);
+  DCHECK(!m_element);
 }
 
 void AXMenuListOption::detach() {
   m_element = nullptr;
   AXMockObject::detach();
 }
 
 AccessibilityRole AXMenuListOption::roleValue() const {
   const AtomicString& ariaRole = getAttribute(roleAttr);
   if (ariaRole.isEmpty())
     return MenuListOptionRole;
 
   AccessibilityRole role = ariaRoleToWebCoreRole(ariaRole);
   if (role)
     return role;
   return MenuListOptionRole;
 }
 
+AXObject* AXMenuListOption::computeParent() const {
+  Node* node = getNode();
+  if (!node)
+    return nullptr;
+  Node* select = toHTMLOptionElement(node)->ownerSelectElement();
+  if (!select)
+    return nullptr;
+  AXObject* selectAXObject = axObjectCache().getOrCreate(select);
+  if (selectAXObject->hasChildren()) {
+    const auto& childObjects = selectAXObject->children();
+    DCHECK(!childObjects.isEmpty());
+    DCHECK_EQ(childObjects.size(), 1UL);
+    DCHECK(childObjects[0]->isMenuListPopup());
+    toAXMenuListPopup(childObjects[0].get())->updateChildrenIfNecessary();
+  } else {
+    selectAXObject->updateChildrenIfNecessary();
+  }
+  return m_parent.get();
+}
+
 Element* AXMenuListOption::actionElement() const {
   return m_element;
 }
 
 bool AXMenuListOption::isEnabled() const {
   // isDisabledFormControl() returns true if the parent <select> element is
   // disabled, which we don't want.
   return m_element && !m_element->ownElementDisabled();
 }
 
@@ skipping 38 matching lines @@
     AXObject** outContainer,
     FloatRect& outBoundsInContainer,
     SkMatrix44& outContainerTransform) const {
   *outContainer = nullptr;
   outBoundsInContainer = FloatRect();
   outContainerTransform.setIdentity();
 
   AXObject* parent = parentObject();
   if (!parent)
     return;
-  ASSERT(parent->isMenuListPopup());
+  DCHECK(parent->isMenuListPopup());
 
   AXObject* grandparent = parent->parentObject();
   if (!grandparent)
     return;
-  ASSERT(grandparent->isMenuList());
+  DCHECK(grandparent->isMenuList());
   grandparent->getRelativeBounds(outContainer, outBoundsInContainer,
                                  outContainerTransform);
 }
 
 String AXMenuListOption::textAlternative(bool recursive,
                                          bool inAriaLabelledByTraversal,
                                          AXObjectSet& visited,
                                          AXNameFrom& nameFrom,
                                          AXRelatedObjectVector* relatedObjects,
                                          NameSources* nameSources) const {
   // If nameSources is non-null, relatedObjects is used in filling it in, so it
   // must be non-null as well.
   if (nameSources)
-    ASSERT(relatedObjects);
+    DCHECK(relatedObjects);
 
   if (!getNode())
     return String();
 
   bool foundTextAlternative = false;
   String textAlternative = ariaTextAlternative(
       recursive, inAriaLabelledByTraversal, visited, nameFrom, relatedObjects,
       nameSources, &foundTextAlternative);
   if (foundTextAlternative && !nameSources)
     return textAlternative;
 
   nameFrom = AXNameFromContents;
   textAlternative = m_element->displayLabel();
   if (nameSources) {
     nameSources->push_back(NameSource(foundTextAlternative));
     nameSources->back().type = nameFrom;
     nameSources->back().text = textAlternative;
     foundTextAlternative = true;
   }
 
   return textAlternative;
 }
 
 DEFINE_TRACE(AXMenuListOption) {
   visitor->trace(m_element);
   AXMockObject::trace(visitor);
 }
 
 }  // namespace blink