//
// $Id$
// From Philippe Le Hegaret (Philippe.Le_Hegaret@sophia.inria.fr)
//
// (c) COPYRIGHT MIT and INRIA, 1997.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css1;

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 http://www.w3.org/TR/2008/REC-CSS1-20080411/#display
 */
public class CssDisplay extends org.w3c.css.properties.css.CssDisplay {

    public static CssIdent block;
    public static CssIdent[] allowed_values;

    static {
        String[] DISPLAY = {
                "block", "inline", "list-item", "none"};
        allowed_values = new CssIdent[DISPLAY.length];
        int i = 0;
        for (String aDISPLAY : DISPLAY) {
            allowed_values[i++] = CssIdent.getIdent(aDISPLAY);
        }
        block = CssIdent.getIdent("block");
    }

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

    /**
     * Create a new CssDisplay
     */
    public CssDisplay() {
        // nothing to do
    }

    /**
     * Create a new CssDisplay
     *
     * @param ac         The context
     * @param expression The expression for this property
     * @param check      boolean, if check has to be enforced
     * @throws InvalidParamException Values are incorect
     */
    public CssDisplay(ApplContext ac, CssExpression expression,
                      boolean check) throws InvalidParamException {

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

        CssValue val = expression.getValue();

        setByUser();

        if (val.getType() == CssTypes.CSS_IDENT) {
            CssIdent id_val = (CssIdent) val;

            value = getMatchingIdent(id_val);
            if (value != null) {
                expression.next();
                return;
            }
        }

        throw new InvalidParamException("value", expression.getValue(),
                getPropertyName(), ac);

    }

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


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

}