w3c.css.properties.css3.CssAnimationDirection 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.css3;

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

import java.util.ArrayList;

import static org.w3c.css.values.CssOperator.COMMA;

/**
 * @spec http://www.w3.org/TR/2012/WD-css3-animations-20120403/#animation-direction
 */
public class CssAnimationDirection extends org.w3c.css.properties.css.CssAnimationDirection {

    public static final CssIdent[] allowed_values;

    static {
        String[] _allowed_values = {"normal", "reverse", "alternate", "alternate-reverse"};
        allowed_values = new CssIdent[_allowed_values.length];
        int i = 0;
        for (String s : _allowed_values) {
            allowed_values[i++] = CssIdent.getIdent(s);
        }
    }

    public static CssIdent getAllowedIdent(CssIdent ident) {
        for (CssIdent id : allowed_values) {
            if (id.equals(ident)) {
                return id;
            }
        }
        return null;
    }

    /**
     * Create a new CssAnimationDirection
     */
    public CssAnimationDirection() {
        value = initial;
    }

    /**
     * Creates a new CssAnimationDirection
     *
     * @param expression The expression for this property
     * @throws org.w3c.css.util.InvalidParamException
     *          Expressions are incorrect
     */
    public CssAnimationDirection(ApplContext ac, CssExpression expression, boolean check)
            throws InvalidParamException {
        setByUser();

        CssValue val;
        char op;
        ArrayList values = new ArrayList();
        boolean singleVal = false;
        CssValue sValue = null;

        while (!expression.end()) {
            val = expression.getValue();
            op = expression.getOperator();
            switch (val.getType()) {
                case CssTypes.CSS_IDENT:
                    if (inherit.equals(val)) {
                        singleVal = true;
                        sValue = inherit;
                        values.add(inherit);
                        break;
                    } else {
                        CssIdent ident = getAllowedIdent((CssIdent) val);
                        if (ident != null) {
                            values.add(ident);
                            break;
                        }
                    }
                    // let it fail
                default:
                    throw new InvalidParamException("value",
                            val.toString(),
                            getPropertyName(), ac);
            }
            expression.next();
            if (!expression.end() && (op != COMMA)) {
                throw new InvalidParamException("operator",
                        ((new Character(op)).toString()), ac);
            }
        }
        if (singleVal && values.size() > 1) {
            throw new InvalidParamException("value",
                    sValue.toString(),
                    getPropertyName(), ac);
        }
        value = (values.size() == 1) ? values.get(0) : new CssLayerList(values);
    }

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