w3c.css.properties.css3.CssBackgroundClip Maven / Gradle / Ivy

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// $Id$
// @author Yves Lafon 
//
// (c) COPYRIGHT 2010  World Wide Web Consortium (MIT, ERCIM, Keio University)
// Please first read the full copyright statement at
// http://www.w3.org/Consortium/Legal/copyright-software-19980720

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/2011/CR-css3-background-20110215/#the-background-clip
 */

public class CssBackgroundClip extends org.w3c.css.properties.css.CssBackgroundClip {

    public final static CssIdent border_box;
    public static CssIdent[] allowed_values;
    public final static String val[] = {"border-box", "padding-box", "content-box"};

    static {
        border_box = CssIdent.getIdent("border-box");
        allowed_values = new CssIdent[val.length];
        int i = 0;
        for (String s : val) {
            allowed_values[i++] = CssIdent.getIdent(s);
        }
    }

    public static boolean isMatchingIdent(CssIdent ident) {
        return (getMatchingIdent(ident) != null);

    }

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

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

    /**
     * Create a new CssBackgroundClip
     *
     * @param expression The expression for this property
     * @throws org.w3c.css.util.InvalidParamException
     *          Incorrect value
     */
    public CssBackgroundClip(ApplContext ac, CssExpression expression,
                             boolean check) throws InvalidParamException {

        ArrayList values = new ArrayList();

        CssValue val;
        CssIdent matchingIdent;
        char op;

        while (!expression.end()) {
            val = expression.getValue();
            op = expression.getOperator();
            switch (val.getType()) {
                case CssTypes.CSS_IDENT:
                    if (inherit.equals(val)) {
                        // if we got inherit after other values, fail
                        // if we got more than one value... fail
                        if ((values.size() > 0) || (expression.getCount() > 1)) {
                            throw new InvalidParamException("value", val,
                                    getPropertyName(), ac);
                        }
                        values.add(inherit);
                        break;
                    }
                    matchingIdent = getMatchingIdent((CssIdent) val);
                    if (matchingIdent != null) {
                        values.add(matchingIdent);
                        break;
                    }
                default:
                    throw new InvalidParamException("value", val,
                            getPropertyName(), ac);
            }
            expression.next();
            if (!expression.end() && (op != COMMA)) {
                throw new InvalidParamException("operator",
                        ((new Character(op)).toString()), ac);
            }
        }
        if (values.size() == 1) {
            value = values.get(0);
        } else {
            value = new CssLayerList(values);
        }
    }

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

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

}