| // Copyright 2014 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_DOM_ATTR_H_ |
| #define COBALT_DOM_ATTR_H_ |
| |
| #include <string> |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "cobalt/script/wrappable.h" |
| |
| namespace cobalt { |
| namespace dom { |
| |
| class Element; |
| class NamedNodeMap; |
| |
| // This type represents a DOM element's attribute as an object. |
| // https://www.w3.org/TR/2014/WD-dom-20140710/#interface-attr |
| // |
| // Starting from DOM4, Attr no longer inherits from Node. |
| // |
| // This class is designed to proxy the actual attribute value which is stored |
| // in the Element and be created only on demand. |
| class Attr : public script::Wrappable, |
| public base::SupportsWeakPtr<Attr> { |
| public: |
| // If container is NULL, the Attr will be created in a detached state. |
| Attr(const std::string& name, const std::string& value, |
| const scoped_refptr<const NamedNodeMap>& container); |
| |
| // Web API: Attr |
| const std::string& name() const { return name_; } |
| const std::string& node_name() const { |
| // TODO: Report deprecated attribute. |
| return name_; |
| } |
| |
| const std::string& value() const { return value_; } |
| void set_value(const std::string& value); |
| |
| const std::string& node_value() const; |
| |
| DEFINE_WRAPPABLE_TYPE(Attr); |
| void TraceMembers(script::Tracer* tracer) override; |
| |
| private: |
| ~Attr(); |
| |
| // Used by NamedNodeMap to set the value of Attr without triggering an |
| // update in the proxied Element. |
| void SetValueInternal(const std::string& value) { value_ = value; } |
| |
| // Used by NamedNodeMap to attach the Attr to itself. |
| scoped_refptr<const NamedNodeMap> container() const; |
| void set_container(const scoped_refptr<const NamedNodeMap>& value); |
| |
| // Name of the attribute. |
| const std::string name_; |
| // Value of the attribute. |
| std::string value_; |
| // Pointer to the NamedNodeMap that contains this Attr. |
| scoped_refptr<const NamedNodeMap> container_; |
| |
| friend class NamedNodeMap; |
| DISALLOW_COPY_AND_ASSIGN(Attr); |
| }; |
| |
| } // namespace dom |
| } // namespace cobalt |
| |
| #endif // COBALT_DOM_ATTR_H_ |