/*
 * Copyright 2011 Vaadin Ltd.
 * 
 * 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.
 */

package com.vaadin.sass.visitor;

import java.util.ArrayList;

import com.vaadin.sass.tree.NestPropertiesNode;
import com.vaadin.sass.tree.Node;
import com.vaadin.sass.tree.RuleNode;

public class NestPropertiesVisitor implements Visitor {

    @Override
    public void traverse(Node node) {
        for (Node child : new ArrayList<Node>(node.getChildren())) {
            if (child instanceof NestPropertiesNode) {
                Node previous = child;
                for (RuleNode unNested : ((NestPropertiesNode) child)
                        .unNesting()) {
                    node.appendChild(unNested, previous);
                    previous = unNested;
                    node.removeChild(child);
                }
            } else {
                traverse(child);
            }
        }
    }
}
