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/*******************************************************************************
 * Copyright (c) 2003, 2010 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.draw2d.graph;

/**
 * For Internal Use only.
 * 
 * @author hudsonr
 * @since 2.1.2
 */
public class Rank extends NodeList {

	int bottomPadding;
	int height;
	int location;

	final int hash = new Object().hashCode();
	int topPadding;
	int total;

	void add(Node n) {
		super.add(n);
	}

	void assignIndices() {
		total = 0;
		Node node;

		int mag;
		for (int i = 0; i < size(); i++) {
			node = getNode(i);
			mag = Math.max(1, node.incoming.size() + node.outgoing.size());
			mag = Math.min(mag, 5);
			if (node instanceof SubgraphBoundary)
				mag = 4;
			total += mag;
			node.index = total;
			total += mag;
		}
	}

	/**
	 * Returns the number of nodes in this rank.
	 * 
	 * @return the number of nodes
	 */
	public int count() {
		return super.size();
	}

	/**
	 * @see Object#equals(Object)
	 */
	public boolean equals(Object o) {
		return o == this;
	}

	/**
	 * @see Object#hashCode() Overridden for speed based on equality.
	 */
	public int hashCode() {
		return hash;
	}

	void setDimensions(int location, int rowHeight) {
		this.height = rowHeight;
		this.location = location;
		for (int i = 0; i < size(); i++) {
			Node n = getNode(i);
			n.y = location;
			n.height = rowHeight;
		}
	}

	/**
	 * @deprecated Do not call
	 */
	public void sort() {
	}

}