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// 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_SIMPLE_SELECTOR_H_
#define COBALT_CSSOM_SIMPLE_SELECTOR_H_
#include <string>
#include "base/compiler_specific.h"
#include "cobalt/base/token.h"
#include "cobalt/cssom/combinator.h"
#include "cobalt/cssom/selector.h"
#include "cobalt/cssom/selector_tree.h"
#include "cobalt/cssom/simple_selector_type.h"
namespace cobalt {
namespace cssom {
class AttributeSelector;
class ClassSelector;
class CompoundSelector;
class IdSelector;
class PseudoClass;
class PseudoElement;
class TypeSelector;
class UniversalSelector;
// A simple selector is either a type selector, universal selector, attribute
// selector, class selector, ID selector, or pseudo-class.
// https://www.w3.org/TR/selectors4/#simple
class SimpleSelector : public Selector {
public:
SimpleSelector(SimpleSelectorType type, base::Token prefix, base::Token text)
: type_(type), prefix_(prefix), text_(text), value_("") {}
SimpleSelector(SimpleSelectorType type, base::Token prefix, base::Token text,
const std::string& value)
: type_(type), prefix_(prefix), text_(text), value_(value) {}
~SimpleSelector() override {}
// From Selector.
SimpleSelector* AsSimpleSelector() override { return this; }
// Rest of public methods.
// Used to sort simple selectors when normalizing compound selector.
SimpleSelectorType type() const { return type_; }
// Returns token representation of the selector.
base::Token prefix() const { return prefix_; }
base::Token text() const { return text_; }
base::Token value() const { return base::Token(value_); }
virtual PseudoElement* AsPseudoElement() { return NULL; }
virtual UniversalSelector* AsUniversalSelector() { return NULL; }
virtual bool AlwaysRequiresRuleMatchingVerificationVisit() const {
return false;
}
virtual CompoundSelector* GetContainedCompoundSelector() const {
return NULL;
}
// Used to index selector tree node's children.
virtual void IndexSelectorTreeNode(SelectorTree::Node* parent_node,
SelectorTree::Node* child_node,
CombinatorType combinator) = 0;
private:
SimpleSelectorType type_;
base::Token prefix_;
base::Token text_;
std::string value_;
};
} // namespace cssom
} // namespace cobalt
#endif // COBALT_CSSOM_SIMPLE_SELECTOR_H_