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

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//
// From Sijtsche de Jong ([email protected])
// Rewriten 2010 Yves Lafon 
//
// (c) COPYRIGHT 1995-2010  World Wide Web Consortium (MIT, ERCIM, Keio, Beihang)
// 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.CssCheckableValue;
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/CR-css3-multicol-20110412/#column-width
 * @spec https://www.w3.org/TR/2016/WD-css-sizing-3-20160512/#column-sizing
 */

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

    public static final CssIdent[] allowed_values;

    static {
        // fill to fit-content from css-sizing
        String[] _allowed_values = {"auto", "fill", "max-content", "min-content", "fit-content"};

        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 CssColumnWidth
     */
    public CssColumnWidth() {
        value = initial;
    }

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

        setByUser();
        CssValue val = expression.getValue();

        if (check && expression.getCount() > 1) {
            throw new InvalidParamException("unrecognize", ac);
        }

        switch (val.getType()) {
            case CssTypes.CSS_NUMBER:
                val.getCheckableValue().checkEqualsZero(ac, this);
                // if we didn't fall in the first trap, there is another one :)
                throw new InvalidParamException("strictly-positive",
                        expression.getValue(),
                        getPropertyName(), ac);
            case CssTypes.CSS_LENGTH:
                CssCheckableValue l = val.getCheckableValue();
                l.checkStrictPositiveness(ac, this);
                value = val;
                break;
            case CssTypes.CSS_IDENT:
                if (inherit.equals(val)) {
                    value = inherit;
                } else {
                    CssIdent id = getAllowedIdent((CssIdent) val);
                    if (id != null) {
                        value = id;
                    } else {
                        throw new InvalidParamException("unrecognize", ac);
                    }
                }
                break;

            default:
                throw new InvalidParamException("value", expression.getValue(),
                        getPropertyName(), ac);
        }
        expression.next();
    }

    public CssColumnWidth(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 (value == initial);
    }

}