| // 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_NAMED_NODE_MAP_H_ |
| #define COBALT_DOM_NAMED_NODE_MAP_H_ |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/hash_tables.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "cobalt/script/property_enumerator.h" |
| #include "cobalt/script/wrappable.h" |
| |
| namespace cobalt { |
| namespace dom { |
| |
| class Attr; |
| class Element; |
| |
| // The NamedNodeMap interface represents a collection of Attr objects. Objects |
| // inside a NamedNodeMap are not in any particular order, unlike NodeList, |
| // although they may be accessed by an index as in an array. |
| // A NamedNodeMap object is live and will thus be auto-updated if changes are |
| // made to its contents internally or elsewhere. |
| // https://dom.spec.whatwg.org/#interface-namednodemap |
| // |
| // This interface is a legacy interface defined in DOM Level 3 Core, and is |
| // referenced in DOM4. The whatwg live spec changes some definitions that is |
| // adopted by major browsers. The whatwg version is followed here. |
| // |
| // Using Attr objects directly to represent Element attributes would incur |
| // a significant memory overhead. Instead, NamedNodeMap and Attr are created |
| // on demand and proxy the content of the actual attributes. |
| class NamedNodeMap : public script::Wrappable, |
| public base::SupportsWeakPtr<NamedNodeMap> { |
| public: |
| explicit NamedNodeMap(const scoped_refptr<Element>& element); |
| |
| // Web API: NamedNodeMap |
| // |
| unsigned int length() const; |
| |
| scoped_refptr<Attr> Item(unsigned int item); |
| scoped_refptr<Attr> GetNamedItem(const std::string& name) const; |
| scoped_refptr<Attr> SetNamedItem(const scoped_refptr<Attr>& attribute); |
| scoped_refptr<Attr> RemoveNamedItem(const std::string& name); |
| |
| bool CanQueryNamedProperty(const std::string& name) const; |
| void EnumerateNamedProperties(script::PropertyEnumerator* enumerator) const; |
| |
| // Custom, not in any spec. |
| // |
| void SetAttributeInternal(const std::string& name, const std::string& value); |
| void RemoveAttributeInternal(const std::string& name); |
| |
| scoped_refptr<Element> element() const; |
| |
| DEFINE_WRAPPABLE_TYPE(NamedNodeMap); |
| void TraceMembers(script::Tracer* tracer) override; |
| |
| private: |
| ~NamedNodeMap(); |
| |
| scoped_refptr<Attr> GetOrCreateAttr(const std::string& name) const; |
| |
| typedef base::hash_map<std::string, base::WeakPtr<Attr> > NameToAttrMap; |
| |
| // The element that contains the actual attributes. |
| scoped_refptr<Element> element_; |
| // Vector of weak pointers to Attr objects that proxies the actual attributes. |
| mutable NameToAttrMap proxy_attributes_; |
| |
| DISALLOW_COPY_AND_ASSIGN(NamedNodeMap); |
| }; |
| |
| } // namespace dom |
| } // namespace cobalt |
| |
| #endif // COBALT_DOM_NAMED_NODE_MAP_H_ |