//
// $Id: Widths.java,v 1.2 2005-09-14 15:14:58 ylafon Exp $
// From Philippe Le Hegaret (Philippe.Le_Hegaret@sophia.inria.fr)
//
// (c) COPYRIGHT MIT and INRIA, 1997.
// Please first read the full copyright statement in file COPYRIGHT.html
/*
 */
package org.w3c.css.properties.css2.font;

import java.util.Vector;

import org.w3c.css.parser.CssStyle;
import org.w3c.css.properties.css1.CssProperty;
import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssNumber;
import org.w3c.css.values.CssOperator;
import org.w3c.css.values.CssUnicodeRange;
import org.w3c.css.values.CssValue;

/**
 */
public class Widths extends CssProperty implements CssOperator {

    Vector values = new Vector();

    /**
     * Create a new Widths
     */
    public Widths() {
	// nothing to do
    }

    /**
     * Creates a new Widths
     *
     * @param expression the unicode em
     * @exception InvalidParamException values are incorrect
     */
    public Widths(ApplContext ac, CssExpression expression, boolean check)
    	throws InvalidParamException {
	CssValue val;
	char op;
	int i = 0;
	setByUser();

	do {
	    val = expression.getValue();
	    op = expression.getOperator();
	    if (val instanceof CssUnicodeRange) {
		values.addElement(val);
		if (op != SPACE) {
		    throw new InvalidParamException("operator",
						    new Character(op),
						    getPropertyName(), ac);
		}
		if (expression.end()) {
		    throw new InvalidParamException("few-value",
						    getPropertyName(), ac);
		}
		expression.next();
	    }
	    do {
		op = expression.getOperator();
		val = expression.getValue();
		if (val instanceof CssNumber) {
		    values.addElement(" ");
		    values.addElement(val);
		} else {
		    throw new InvalidParamException("value",
						    val,
						    getPropertyName(), ac);
		}
		expression.next();
	    } while ((op == SPACE) && !expression.end());
	    values.addElement(", ");
	} while (op == CssOperator.COMMA);

    }

    public Widths(ApplContext ac, CssExpression expression)
	    throws InvalidParamException {
	this(ac, expression, false);
    }

    /**
     * Returns the current value
     */
    public Object get() {
	return values.elementAt(0);
    }

    /**
     * Returns a string representation of the object.
     */
    public String toString() {
	String ret = "";
	int i = 0;
	while (i < (values.size() - 2)) {
	    ret += values.elementAt(i);
	    i++;
	}
	return ret;
    }

    /**
     * Returns the name of this property
     */
    public String getPropertyName() {
	return "widths";
    }

    /**
     * Add this property to the CssStyle.
     *
     * @param style The CssStyle
     */
    public void addToStyle(ApplContext ac, CssStyle style) {
	Css2Style style0 = (Css2Style) style;
	if (style0.widths != null) {
	    style0.addRedefinitionWarning(ac, this);
	}
	style0.widths = this;
    }

    /**
     * Get this property in the style.
     *
     * @param style The style where the property is
     * @param resolve if true, resolve the style to find this property
     */
    public CssProperty getPropertyInStyle(CssStyle style, boolean resolve) {
	if (resolve) {
	    return ((Css2Style) style).getWidths();
	} else {
	    return ((Css2Style) style).widths;
	}
    }

    /**
     * Compares two properties for equality.
     *
     * @param value The other property.
     */
    public boolean equals(CssProperty property) {
	// @@TODO
	return false;
    }

    /**
     * Is the value of this property is a default value.
     * It is used by all macro for the function <code>print</code>
     */
    public boolean isDefault() {
	return false;
    }

}
