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// Copyright 2015 Google Inc. 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_PSEUDO_CLASS_H_
#define COBALT_CSSOM_PSEUDO_CLASS_H_
#include "base/compiler_specific.h"
#include "cobalt/cssom/simple_selector.h"
#include "cobalt/cssom/specificity.h"
namespace cobalt {
namespace cssom {
class ActivePseudoClass;
class EmptyPseudoClass;
class FocusPseudoClass;
class HoverPseudoClass;
class NotPseudoClass;
// The pseudo-class concept is introduced to permit selection based on
// information that lies outside of the document tree or that can be awkward or
// impossible to express using the other simple selectors.
// https://www.w3.org/TR/selectors4/#pseudo-classes
class PseudoClass : public SimpleSelector {
public:
explicit PseudoClass(base::Token text)
: SimpleSelector(kPseudoClass,
base::Tokens::pseudo_class_selector_prefix(), text) {}
~PseudoClass() OVERRIDE {}
// From Selector.
Specificity GetSpecificity() const OVERRIDE { return Specificity(0, 1, 0); }
// Rest of public methods.
virtual ActivePseudoClass* AsActivePseudoClass() { return NULL; }
virtual EmptyPseudoClass* AsEmptyPseudoClass() { return NULL; }
virtual FocusPseudoClass* AsFocusPseudoClass() { return NULL; }
virtual HoverPseudoClass* AsHoverPseudoClass() { return NULL; }
virtual NotPseudoClass* AsNotPseudoClass() { return NULL; }
};
} // namespace cssom
} // namespace cobalt
#endif // COBALT_CSSOM_PSEUDO_CLASS_H_