| // 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_EMPTY_PSEUDO_CLASS_H_ |
| #define COBALT_CSSOM_EMPTY_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 :empty pseudo-class represents an element that has no children. In terms |
| // of the document tree, only element nodes and content nodes (such as DOM |
| // text nodes, CDATA nodes, and entity references) whose data has a non-zero |
| // length must be considered as affecting emptiness; comments, processing |
| // instructions, and other nodes must not affect whether an element is |
| // considered empty or not. |
| // https://www.w3.org/TR/selectors4/#empty-pseudo |
| class EmptyPseudoClass : public PseudoClass { |
| public: |
| EmptyPseudoClass() |
| : PseudoClass(base::Tokens::empty_pseudo_class_selector()) {} |
| ~EmptyPseudoClass() 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. |
| EmptyPseudoClass* AsEmptyPseudoClass() override { return this; } |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(EmptyPseudoClass); |
| }; |
| |
| } // namespace cssom |
| } // namespace cobalt |
| |
| #endif // COBALT_CSSOM_EMPTY_PSEUDO_CLASS_H_ |