Implement the inert attribute

third_party/WebKit/Source/modules/accessibility/AXObject.h

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * 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.
@@ skipping 381 matching lines @@
   kAXDescriptionFromUninitialized = -1,
   kAXDescriptionFromAttribute = 0,
   kAXDescriptionFromContents,
   kAXDescriptionFromRelatedElement,
 };
 
 enum AXIgnoredReason {
   kAXActiveModalDialog,
   kAXAncestorDisallowsChild,
   kAXAncestorIsLeafNode,
-  kAXAriaHidden,
-  kAXAriaHiddenRoot,
+  kAXAriaHiddenElement,
+  kAXAriaHiddenSubtree,
   kAXEmptyAlt,
   kAXEmptyText,
-  kAXInert,
+  kAXInertElement,
+  kAXInertSubtree,
   kAXInheritsPresentation,
   kAXLabelContainer,
   kAXLabelFor,
   kAXNotRendered,
   kAXNotVisible,
   kAXPresentationalRole,
   kAXProbablyPresentational,
   kAXStaticTextUsedAsNameFor,
   kAXUninteresting
 };
@@ skipping 288 matching lines @@
   virtual bool IsSelectedOptionActive() const { return false; }
   virtual bool IsVisible() const { return true; }
   virtual bool IsVisited() const { return false; }
 
   // Check whether certain properties can be modified.
   virtual bool CanSetFocusAttribute() const { return false; }
   virtual bool CanSetValueAttribute() const { return false; }
   virtual bool CanSetSelectedAttribute() const { return false; }
 
   // Whether objects are ignored, i.e. not included in the tree.
-  bool AccessibilityIsIgnored() const;
+  bool AccessibilityIsIgnored();
   typedef HeapVector<IgnoredReason> IgnoredReasons;
   virtual bool ComputeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const {
     return true;
   }
   bool AccessibilityIsIgnoredByDefault(IgnoredReasons* = nullptr) const;
   AXObjectInclusion AccessibilityPlatformIncludesObject() const;
   virtual AXObjectInclusion DefaultObjectInclusion(
       IgnoredReasons* = nullptr) const;
   bool IsInertOrAriaHidden() const;
   const AXObject* AriaHiddenRoot() const;
@@ skipping 364 matching lines @@
   virtual const AXObject* InheritsPresentationalRoleFrom() const { return 0; }
 
   virtual bool NameFromContents() const;
 
   AccessibilityRole ButtonRoleType() const;
 
   virtual LayoutObject* LayoutObjectForRelativeBounds() const {
     return nullptr;
   }
 
+  const AXObject* InertRoot() const;
+
   mutable Member<AXObject> parent_;
 
   // The following cached attribute values (the ones starting with m_cached*)
   // are only valid if m_lastModificationCount matches
   // AXObjectCacheImpl::modificationCount().
   mutable int last_modification_count_;
   mutable RGBA32 cached_background_color_;
   mutable bool cached_is_ignored_ : 1;
   mutable bool cached_is_inert_or_aria_hidden_ : 1;
   mutable bool cached_is_descendant_of_leaf_node_ : 1;
@@ skipping 18 matching lines @@
   static unsigned number_of_live_ax_objects_;
 };
 
 #define DEFINE_AX_OBJECT_TYPE_CASTS(thisType, predicate)           \
   DEFINE_TYPE_CASTS(thisType, AXObject, object, object->predicate, \
                     object.predicate)
 
 }  // namespace blink
 
 #endif  // AXObject_h