/*******************************************************************************
 * Copyright (c) 2006 Sybase, Inc. 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:
 *     Sybase, Inc. - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.pagedesigner.css2.property;

import org.eclipse.jst.pagedesigner.css2.ICSSStyle;
import org.w3c.dom.css.CSSValue;

/**
 * The result value will always be integer, range 100-900 This class has already
 * translate things like "normal", "bold", "bolder", "lighter" into integer
 * value.
 * 
 * @author mengbo
 */
public class FontWeightMeta extends CSSPropertyMeta {

	/**
	 * normal weight value
	 */
	public static final Integer NORMAL_WEIGHT = new Integer(400);

	private static final Integer BOLD_WEIGHT = new Integer(700);

	private static final String[] KEYWORDS = new String[] { ICSSPropertyID.VAL_NORMAL,
			ICSSPropertyID.VAL_BOLD, ICSSPropertyID.VAL_BOLDER,
			ICSSPropertyID.VAL_LIGHTER };


	/**
	 * Default constructor
	 */
	public FontWeightMeta() {
		super(true, NORMAL_WEIGHT);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jst.pagedesigner.css2.property.CSSPropertyMeta#getKeywordValues()
	 */
	protected String[] getKeywordValues() {
		return KEYWORDS;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jst.pagedesigner.css2.property.CSSPropertyMeta#calculateCSSValueResult(org.w3c.dom.css.CSSValue,
	 *      java.lang.String,
	 *      org.eclipse.jst.pagedesigner.css2.style.AbstractStyle)
	 */
	public Object calculateCSSValueResult(CSSValue value, String propertyName,
			ICSSStyle style) {
		String text = value.getCssText();
		String result = checkKeywordValues(text);
		if (result == null) {
			try {
				int i = Integer.parseInt(text);
				if (i < 100) {
					i = 100;
				}
				if (i > 900) {
					i = 900;
				}
				return new Integer(i);
			} catch (Exception ex) {
				// Error in integer processing
				return NORMAL_WEIGHT;
			}
		} else if (ICSSPropertyID.VAL_NORMAL.equals(result)) {
			return NORMAL_WEIGHT;
		} else if (ICSSPropertyID.VAL_BOLD.equals(result)) {
			return BOLD_WEIGHT;
		} else if (ICSSPropertyID.VAL_BOLDER.equals(result)) {
			// int i = style.getParentStyle().getCSSFont().getWeight() + 100;
			// if (i < 100)
			// i = 100;
			// if (i > 900)
			// i = 900;
			// return new Integer(i);
			return BOLD_WEIGHT;
		} else if (ICSSPropertyID.VAL_LIGHTER.equals(result)) {
			int i = style.getParentStyle().getCSSFont().getWeight() - 100;
			if (i < 100) {
				i = 100;
			}
			if (i > 900) {
				i = 900;
			}
			return new Integer(i);
		}
		return NORMAL_WEIGHT;
	}
}