Implement the inert attribute

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

 /*
  * Copyright (C) 2010 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 INC. ``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 INC. OR
  * 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.
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 #include "modules/accessibility/AXMenuListOption.h"
 
 #include "SkMatrix44.h"
+#include "base/debug/stack_trace.h"
 #include "core/dom/AccessibleNode.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& ax_object_cache)
-    : AXMockObject(ax_object_cache), element_(element) {}
+    : AXMockObject(ax_object_cache), element_(element) {
+  LOG(INFO) << "this " << this << "; element " << element
+            << " textContent:" << element->textContent().Utf8().data()
+            << "; trace: ";
+  base::debug::StackTrace trace;
+  trace.Print();
+}
 
 AXMenuListOption::~AXMenuListOption() {
   DCHECK(!element_);
 }
 
 void AXMenuListOption::Detach() {
   element_ = nullptr;
   AXMockObject::Detach();
 }
 
 AccessibilityRole AXMenuListOption::RoleValue() const {
   const AtomicString& aria_role =
       GetAOMPropertyOrARIAAttribute(AOMStringProperty::kRole);
   if (aria_role.IsEmpty())
     return kMenuListOptionRole;
 
   AccessibilityRole role = AriaRoleToWebCoreRole(aria_role);
   if (role)
     return role;
   return kMenuListOptionRole;
 }
 
 Element* AXMenuListOption::ActionElement() const {
   return element_;
 }
 
+AXObject* AXMenuListOption::ComputeParent() const {
+  LOG(INFO) << "ComputeParent for MenuListOption " << this;
+  Node* node = GetNode();
+  if (!node) {
+    LOG(INFO) << "!node";
+    return nullptr;
+  }
+  HTMLSelectElement* select = toHTMLOptionElement(node)->OwnerSelectElement();
+  if (!select) {
+    LOG(INFO) << "!select";
+    return nullptr;
+  }
+  LOG(INFO) << "Found select";
+  AXObject* select_ax_object = AxObjectCache().GetOrCreate(select);
+  if (select_ax_object->HasChildren()) {
+    const auto& child_objects = select_ax_object->Children();
+    DCHECK(!child_objects.IsEmpty());
+    DCHECK_EQ(child_objects.size(), 1UL);
+    DCHECK(child_objects[0]->IsMenuListPopup());
+    ToAXMenuListPopup(child_objects[0].Get())->UpdateChildrenIfNecessary();
+  } else {
+    select_ax_object->UpdateChildrenIfNecessary();
+  }
+  LOG(INFO) << "Returning parent_.Get(): " << parent_.Get();
+  return parent_.Get();
+}
+
 bool AXMenuListOption::IsEnabled() const {
   // isDisabledFormControl() returns true if the parent <select> element is
   // disabled, which we don't want.
   return element_ && !element_->OwnElementDisabled();
 }
 
 bool AXMenuListOption::IsVisible() const {
   if (!parent_)
     return false;
 
@@ skipping 83 matching lines @@
 
   return text_alternative;
 }
 
 DEFINE_TRACE(AXMenuListOption) {
   visitor->Trace(element_);
   AXMockObject::Trace(visitor);
 }
 
 }  // namespace blink