// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef COBALT_CSSOM_HOVER_PSEUDO_CLASS_H_
#define COBALT_CSSOM_HOVER_PSEUDO_CLASS_H_

#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "cobalt/base/tokens.h"
#include "cobalt/cssom/pseudo_class.h"
#include "cobalt/cssom/selector_tree.h"

namespace cobalt {
namespace cssom {

class SelectorVisitor;

// The :hover pseudo-class applies while the user designates an element with a
// pointing device, but does not necessarily activate it. For example, a visual
// user agent could apply this pseudo-class when the cursor (mouse pointer)
// hovers over a box generated by the element. Interactive user agents that
// cannot detect hovering due to hardware limitations (e.g., a pen device that
// does not detect hovering) are still conforming.
//   https://www.w3.org/TR/selectors4/#hover-pseudo
class HoverPseudoClass : public PseudoClass {
 public:
  HoverPseudoClass()
      : PseudoClass(base::Tokens::hover_pseudo_class_selector()) {}
  ~HoverPseudoClass() override {}

  // From Selector.
  void Accept(SelectorVisitor* visitor) override;

  // From SimpleSelector.
  void IndexSelectorTreeNode(SelectorTree::Node* parent_node,
                             SelectorTree::Node* child_node,
                             CombinatorType combinator) override;

  // From PseudoClass.
  HoverPseudoClass* AsHoverPseudoClass() override { return this; }

 private:
  DISALLOW_COPY_AND_ASSIGN(HoverPseudoClass);
};

}  // namespace cssom
}  // namespace cobalt

#endif  // COBALT_CSSOM_HOVER_PSEUDO_CLASS_H_