w3c.css.properties.css21.CssFontVariant Maven / Gradle / Ivy

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Backend for the W3C CSS Validation Service

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// $Id$
// Author: Yves Lafon 
//
// (c) COPYRIGHT MIT, ERCIM and Keio University, 2012.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css21;

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.CssTypes;
import org.w3c.css.values.CssValue;

/**
 * @spec http://www.w3.org/TR/2011/REC-CSS2-20110607/fonts.html#propdef-font-variant
 */
public class CssFontVariant extends org.w3c.css.properties.css.CssFontVariant {

    public static final CssIdent normal = CssIdent.getIdent("normal");
    public static final CssIdent smallCaps = CssIdent.getIdent("small-caps");

    public static final CssIdent getAllowedFontVariant(CssIdent ident) {
        if (smallCaps.equals(ident)) {
            return smallCaps;
        }
        if (normal.equals(ident)) {
            return normal;
        }
        return null;
    }

    /**
     * Creates a new CssFontVariant
     *
     * @param expression The expression for this property
     * @throws org.w3c.css.util.InvalidParamException
     *          Expressions are incorrect
     */
    public CssFontVariant(ApplContext ac, CssExpression expression, boolean check)
            throws InvalidParamException {
        if (check && expression.getCount() > 1) {
            throw new InvalidParamException("unrecognize", ac);
        }
        setByUser();

        CssValue val;
        char op;

        val = expression.getValue();
        op = expression.getOperator();

        if (val.getType() == CssTypes.CSS_IDENT) {
            CssIdent ident = (CssIdent) val;
            if (inherit.equals(ident)) {
                value = inherit;
            } else {
                value = getAllowedFontVariant(ident);
                if (value == null) {
                    throw new InvalidParamException("value",
                            val.toString(),
                            getPropertyName(), ac);
                }
            }
        } else {
            throw new InvalidParamException("value",
                    val.toString(),
                    getPropertyName(), ac);
        }
        expression.next();
    }

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

    public CssFontVariant() {
    }
}