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/* 
 * This file is part of the Echo Web Application Framework (hereinafter "Echo").
 * Copyright (C) 2002-2009 NextApp, Inc.
 *
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 */

package nextapp.echo.app.serial.property;

import nextapp.echo.app.BoxShadow;
import nextapp.echo.app.BoxShadow.BoxStyle;
import nextapp.echo.app.Color;
import nextapp.echo.app.Extent;
import nextapp.echo.app.serial.SerialContext;
import nextapp.echo.app.serial.SerialException;
import nextapp.echo.app.serial.SerialPropertyPeer;
import nextapp.echo.app.util.Context;
import nextapp.echo.app.util.DomUtil;

import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * SerialPropertyPeer for BoxShadow properties.
 * 
 * @author sieskei (XSoft Ltd.)
 */
public class BoxShadowPeer implements SerialPropertyPeer {

    /**
     * Creates a Node representation of the box shadow state suitable for appending to a property element.
     * 
     * @param context
     *            the relevant Context
     * @param boxShadow
     *            the box shadow to render
     * @return the created Element node
     */
    public static final Node toNode(Context context, BoxShadow boxShadow) throws SerialException {
        SerialContext serialContext = (SerialContext) context.get(SerialContext.class);
        Element boxElement = serialContext.getDocument().createElement("box");
        boxElement.setAttribute("h", ExtentPeer.toString(boxShadow.getHorizontalShadowPosition()));
        boxElement.setAttribute("v", ExtentPeer.toString(boxShadow.getVerticalShadowPosition()));
        boxElement.setAttribute("b", ExtentPeer.toString(boxShadow.getBlurDistance()));
        boxElement.setAttribute("s", ExtentPeer.toString(boxShadow.getSpreadSize()));
        boxElement.setAttribute("c", ColorPeer.toString(boxShadow.getColor()));
        boxElement.setAttribute("i", boxShadow.getStyle().name());
        return boxElement;
    }

    public Object toProperty(Context context, Class objectClass, Element propertyElement) throws SerialException {
        Element boxElement = DomUtil.getChildElementByTagName(propertyElement, "box");
        final Extent hShadow = ExtentPeer.fromString(boxElement.getAttribute("h"));
        final Extent vShadow = ExtentPeer.fromString(boxElement.getAttribute("v"));
        final Extent blurDistance = ExtentPeer.fromString(boxElement.getAttribute("b"));
        final Extent spreadSize = ExtentPeer.fromString(boxElement.getAttribute("s"));
        final Color color = ColorPeer.fromString(boxElement.getAttribute("v"));
        final BoxStyle style = BoxStyle.valueOf(boxElement.getAttribute("i"));
        return new BoxShadow(hShadow, vShadow, blurDistance, spreadSize, color, style);
    }

    public void toXml(Context context, Class objectClass, Element propertyElement, Object propertyValue) throws SerialException {
        propertyElement.setAttribute("t", "BoxShadow");
        BoxShadow boxShadow = (BoxShadow) propertyValue;
        propertyElement.appendChild(toNode(context, boxShadow));
    }
}