//
// $Id: FontStyle.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.CssIdent;
import org.w3c.css.values.CssOperator;
import org.w3c.css.values.CssValue;

/**
 */
public class FontStyle extends CssProperty implements FontConstant {

    Vector values = new Vector();

    private static CssIdent all = new CssIdent("all");

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

    /**
     * Creates a new FontStyle
     *
     * @param expression the font style
     * @exception InvalidParamException values are incorrect
     */
    public FontStyle(ApplContext ac, CssExpression expression, boolean check)
    	throws InvalidParamException {
	char op = expression.getOperator();
	CssValue val = expression.getValue();
	setByUser();

	if (val.equals(all)) {
	    values.addElement(all);
	    expression.next();
	    return;
	}

	do {
	    if (expression.getValue() instanceof CssIdent) {
		int hash = ((CssIdent) expression.getValue()).hashCode();
		int i = 0;
		for (; i<hash_values.length; i++) {
		    if (hash_values[i] == hash) {
			values.addElement(FONTSTYLE[i]);
			break;
		    }
		}
		if (i == FONTSTYLE.length) {
		    throw new InvalidParamException("value",
						    expression.getValue(),
						    getPropertyName(), ac);
		}
	    } else {
		throw new InvalidParamException("value", expression.getValue(),
						getPropertyName(), ac);
	    }
	    op = expression.getOperator();
	    expression.next();
	} while (op == CssOperator.COMMA);

    }

    public FontStyle(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()) {
	    ret += ", " + values.elementAt(i);
	    i++;
	}

	return ret.substring(2);
    }

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

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

    /**
     * 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;
    }

    private static int[] hash_values;

    static {
	hash_values = new int[FONTSTYLE.length];
	for (int i=0; i<FONTSTYLE.length; i++)
	    hash_values[i] = FONTSTYLE[i].hashCode();
    }
}
