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// Copyright 2014 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_DOM_NODE_CHILDREN_ITERATOR_H_
#define COBALT_DOM_NODE_CHILDREN_ITERATOR_H_
#include "cobalt/dom/node.h"
namespace cobalt {
namespace dom {
// Iterates over the first-level children of the given node.
class NodeChildrenIterator {
public:
explicit NodeChildrenIterator(const scoped_refptr<const Node>& parent)
: parent_(parent), current_(NULL) {}
Node* First() {
current_ = parent_->first_child();
return current_;
}
Node* Next() {
if (current_) {
current_ = current_->next_sibling();
}
return current_;
}
private:
scoped_refptr<const Node> parent_;
// Scoped pointer is not used for optimization reasons.
Node* current_;
};
} // namespace dom
} // namespace cobalt
#endif // COBALT_DOM_NODE_CHILDREN_ITERATOR_H_