w3c.css.properties.css3.CssFontSynthesis 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.CssOperator;
import org.w3c.css.values.CssTypes;
import org.w3c.css.values.CssValue;
import org.w3c.css.values.CssValueList;

import java.util.ArrayList;

/**
 * @spec http://www.w3.org/TR/2011/WD-css3-fonts-20111004/#propdef-font-synthesis
 */
public class CssFontSynthesis extends org.w3c.css.properties.css.CssFontSynthesis {

    public static final CssIdent style;
    public static final CssIdent weight;

    static {
        style = CssIdent.getIdent("style");
        weight = CssIdent.getIdent("weight");
    }

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

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

        if (check && expression.getCount() > 2) {
            throw new InvalidParamException("unrecognize", ac);
        }

        setByUser();

        CssValue val;
        char op;

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

        if (val.getType() == CssTypes.CSS_IDENT) {
            CssIdent ident = (CssIdent) val;
            if (inherit.equals(ident)) {
                value = inherit;
            } else if (none.equals(ident)) {
                value = none;
            } else if (weight.equals(ident)) {
                if (expression.getCount() > 1) {
                    if (op != CssOperator.SPACE) {
                        throw new InvalidParamException("operator",
                                ((new Character(op)).toString()), ac);
                    }
                    expression.next();
                    val = expression.getValue();
                    if (!style.equals(val)) {
                        throw new InvalidParamException("value",
                                val.toString(),
                                getPropertyName(), ac);
                    }
                    ArrayList v = new ArrayList(2);
                    v.add(style);
                    v.add(weight);
                    value = new CssValueList(v);
                } else {
                    value = weight;
                }
            } else if (style.equals(ident)) {
                if (expression.getCount() > 1) {
                    if (op != CssOperator.SPACE) {
                        throw new InvalidParamException("operator",
                                ((new Character(op)).toString()), ac);
                    }
                    expression.next();
                    val = expression.getValue();
                    if (!weight.equals(val)) {
                        throw new InvalidParamException("value",
                                val.toString(),
                                getPropertyName(), ac);
                    }
                    ArrayList v = new ArrayList(2);
                    v.add(style);
                    v.add(weight);
                    value = new CssValueList(v);
                } else {
                    value = style;
                }
            } else {
                throw new InvalidParamException("value",
                        val.toString(),
                        getPropertyName(), ac);
            }
        } else {
            throw new InvalidParamException("value",
                    val.toString(),
                    getPropertyName(), ac);
        }
        expression.next();
    }

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

}