w3c.css.properties.css2.CssCue 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, 2013.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css2;

import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssOperator;
import org.w3c.css.values.CssValue;
import org.w3c.css.values.CssValueList;

import java.util.ArrayList;

/**
 * @spec http://www.w3.org/TR/2008/REC-CSS2-20080411/aural.html#propdef-cue
 */
public class CssCue extends org.w3c.css.properties.css.CssCue {

    /**
     * Create a new CssCue
     */
    public CssCue() {
    }

    /**
     * Creates a new CssCue
     *
     * @param expression The expression for this property
     * @throws org.w3c.css.util.InvalidParamException
     *          Expressions are incorrect
     */
    public CssCue(ApplContext ac, CssExpression expression, boolean check)
            throws InvalidParamException {
        if (check && expression.getCount() > 2) {
            throw new InvalidParamException("unrecognize", ac);
        }
        setByUser();

        char op;

        cssCueBefore = new CssCueBefore(ac, expression, false);
        if (expression.end()) {
            cssCueAfter = new CssCueAfter();
            cssCueAfter.value = cssCueBefore.value;
            value = cssCueBefore.value;
        } else {
            op = expression.getOperator();
            if (op != CssOperator.SPACE) {
                throw new InvalidParamException("operator",
                        ((new Character(op)).toString()), ac);
            }
            cssCueAfter = new CssCueAfter(ac, expression, false);
            if (cssCueBefore.value == inherit || cssCueAfter.value == inherit) {
                throw new InvalidParamException("value",
                        inherit, getPropertyName(), ac);
            }
            ArrayList values = new ArrayList(2);
            values.add(cssCueBefore.value);
            values.add(cssCueAfter.value);
            value = new CssValueList(values);
        }
    }

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