w3c.css.properties.css3.fontface.CssFontDisplay Maven / Gradle / Ivy

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//
// Author: Yves Lafon 
//
// (c) COPYRIGHT MIT, ERCIM, Keio, Beihang, 2018.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css3.fontface;

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 https://www.w3.org/TR/2018/WD-css-fonts-4-20180410/#font-display-desc
 */
public class CssFontDisplay extends org.w3c.css.properties.css.fontface.CssFontDisplay {

    public static final CssIdent[] allowed_values;

    static {
        String[] _allowed_values = {"auto", "block", "swap", "fallback", "optional"};
        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 CssFontDisplay
     */
    public CssFontDisplay() {
        value = initial;
    }

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

        setByUser();

        char op;
        CssValue val;

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

        switch (val.getType()) {
            case CssTypes.CSS_IDENT:
                value = getAllowedIdent((CssIdent) val);
                if (value != null) {
                    break;
                }
            default:
                throw new InvalidParamException("value",
                        val.toString(),
                        getPropertyName(), ac);
        }
        expression.next();
    }

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

}