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//
// $Id: CssMedia.java,v 1.3 2010-01-05 13:49:53 ylafon Exp $
// From Sijtsche de Jong ([email protected])
//
// (c) COPYRIGHT 1995-2000  World Wide Web Consortium (MIT, INRIA, 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.parser.CssStyle;
import org.w3c.css.properties.css.CssProperty;
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.CssValue;

import java.util.Vector;


/**
 * This property sets the preferred media for this stylesheet
 */

public class CssMedia extends CssProperty implements CssOperator {

    CssValue value;
    Vector values = new Vector();

    static CssIdent all = CssIdent.getIdent("all");

    private String[] media = {
            "all", "aural", "braille", "embossed", "handheld", "print",
            "projection", "screen", "presentation", "tty", "tv"};

    /**
     * Create a new CssMedia
     */
    public CssMedia() {
        value = all;
    }

    /**
     * Create a new CssMedia
     */
    public CssMedia(ApplContext ac, CssExpression expression,
                    boolean check) throws InvalidParamException {

        //setByUser();
        char op = expression.getOperator();
        CssValue val = expression.getValue();
        int counter = 0;


        while ((op == COMMA || op == SPACE)
                && (counter < expression.getCount())) {

            int i = 0;
            for (; i < media.length; i++) {
                if (val.toString().equals(media[i])) {
                    break;
                }
            }

            if (i == media.length) {
                throw new InvalidParamException("media", expression.getValue(),
                        getPropertyName(), ac);
            }

            values.addElement(val);
            expression.next();
            counter++;
            val = expression.getValue();
            op = expression.getOperator();
        }
    }

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

    /**
     * Add this property to the CssStyle.
     *
     * @param style The CssStyle
     */
    public void addToStyle(ApplContext ac, CssStyle style) {
        if (((Css3Style) style).cssMedia != null)
            style.addRedefinitionWarning(ac, this);
        ((Css3Style) style).cssMedia = this;

    }

    /**
     * Get this property in the style.
     *
     * @param style   The style where the property is
     * @param resolve if true, resolve the style to find this property
     */
    public CssProperty getPropertyInStyle(CssStyle style, boolean resolve) {
        if (resolve) {
            return ((Css3Style) style).getMedia();
        } else {
            return ((Css3Style) style).cssMedia;
        }
    }

    /**
     * Compares two properties for equality.
     *
     * @param property The other property.
     */
    public boolean equals(CssProperty property) {
        return false;
    }

    /**
     * Returns the name of this property
     */
    public String getPropertyName() {
        return "media";
    }

    /**
     * Returns the value of this property
     */
    public Object get() {
        if (value != null) {
            return value;
        } else {
            return values;
        }
    }

    /**
     * Returns true if this property is "softly" inherited
     * This property can't be inherited, it's only for @preference
     */
    public boolean isSoftlyInherited() {
        return false;
    }

    /**
     * Returns a string representation of the object
     */
    public String toString() {
        if (value != null) {
            return value.toString();
        } else {
            StringBuilder sb = new StringBuilder();
            for (CssValue val : values) {
                sb.append(val.toString());
                sb.append(' ');
            }
            sb.setLength(sb.length() - 1);
            return sb.toString();
        }
    }

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

}