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// Copyright 2017 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_REGISTERED_OBSERVER_LIST_H_
#define COBALT_DOM_REGISTERED_OBSERVER_LIST_H_
#include <vector>
#include "base/memory/ref_counted.h"
#include "cobalt/dom/mutation_observer.h"
#include "cobalt/dom/mutation_observer_init.h"
#include "cobalt/dom/registered_observer.h"
#include "cobalt/script/tracer.h"
namespace cobalt {
namespace dom {
class Node;
// A list of "registered observers" as described in the Mutation Observer spec.
// https://www.w3.org/TR/dom/#registered-observer
//
// Implements the functionality described in the MutationObserver.observe
// method:
// https://www.w3.org/TR/dom/#dom-mutationobserver-observe
class RegisteredObserverList : public script::Traceable {
public:
typedef std::vector<RegisteredObserver> RegisteredObserverVector;
// A RegisteredObserverList must not outlive the |target| node that is being
// observed.
explicit RegisteredObserverList(const Node* target) : target_(target) {}
// Implement the MutationObserver.observe method
// https://www.w3.org/TR/dom/#dom-mutationobserver-observe
bool AddMutationObserver(const scoped_refptr<MutationObserver>& observer,
const MutationObserverInit& options);
void RemoveMutationObserver(const scoped_refptr<MutationObserver>& observer);
const RegisteredObserverVector& registered_observers() {
return registered_observers_;
}
void TraceMembers(script::Tracer* tracer) override;
private:
const Node* target_;
RegisteredObserverVector registered_observers_;
};
} // namespace dom
} // namespace cobalt
#endif // COBALT_DOM_REGISTERED_OBSERVER_LIST_H_