/*
 * Font.java
 *
 *
 *  The Salamander Project - 2D and 3D graphics libraries in Java
 *  Copyright (C) 2004 Mark McKay
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 *  Mark McKay can be contacted at mark@kitfox.com.  Salamander and other
 *  projects can be found at http://www.kitfox.com
 *
 * Created on February 20, 2004, 10:00 PM
 */

package com.kitfox.svg;

import com.kitfox.svg.xml.StyleAttribute;
import com.kitfox.svg.xml.*;
import org.xml.sax.*;

import java.awt.*;
import java.awt.geom.*;
import java.util.*;

import com.kitfox.svg.pathcmd.*;
//import org.apache.batik.ext.awt.geom.ExtendedGeneralPath;

/**
 * Implements an embedded font.
 *
 * SVG specification: http://www.w3.org/TR/SVG/fonts.html
 *
 * @author Mark McKay
 * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
 */
public class MissingGlyph extends ShapeElement
{
    //We may define a path
//    ExtendedGeneralPath path = null;
    Shape path = null;

    //Alternately, we may have child graphical elements
//    Vector members = null;

    int horizAdvX = -1;  //Inherits font's value if not set
    int vertOriginX = -1;  //Inherits font's value if not set
    int vertOriginY = -1;  //Inherits font's value if not set
    int vertAdvY = -1;  //Inherits font's value if not set

    /** Creates a new instance of Font */
    public MissingGlyph()
    {
    }
/*
    public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
    {
		//Load style string
        super.loaderStartElement(helper, attrs, parent);

        //If glyph path was specified, calculate it
        String commandList = attrs.getValue("d");
        if (commandList != null)
        {
            StyleAttribute atyleAttrib = getStyle("fill-rule");
            String fillRule = (atyleAttrib == null) ? "nonzero" : atyleAttrib.getStringValue();

            PathCommand[] commands = parsePathList(commandList);

//            ExtendedGeneralPath buildPath = new ExtendedGeneralPath(
            GeneralPath buildPath = new GeneralPath(
                fillRule.equals("evenodd") ? GeneralPath.WIND_EVEN_ODD : GeneralPath.WIND_NON_ZERO,
                commands.length);

            BuildHistory hist = new BuildHistory();

            for (int i = 0; i < commands.length; i++)
            {
                PathCommand cmd = commands[i];
                cmd.appendPath(buildPath, hist);
            }

            //Reflect glyph path to put it in user coordinate system
            AffineTransform at = new AffineTransform();
            at.scale(1, -1);
            path = at.createTransformedShape(buildPath);
        }


        //Read glyph spacing info
        String horizAdvX = attrs.getValue("horiz-adv-x");
        String vertOriginX = attrs.getValue("vert-origin-x");
        String vertOriginY = attrs.getValue("vert-origin-y");
        String vertAdvY = attrs.getValue("vert-adv-y");

        if (horizAdvX != null) this.horizAdvX = XMLParseUtil.parseInt(horizAdvX);
        if (vertOriginX != null) this.vertOriginX = XMLParseUtil.parseInt(vertOriginX);
        if (vertOriginY != null) this.vertOriginY = XMLParseUtil.parseInt(vertOriginY);
        if (vertAdvY != null) this.vertAdvY = XMLParseUtil.parseInt(vertAdvY);

    }
*/
    /**
     * Called after the start element but before the end element to indicate
     * each child tag that has been processed
     */
    public void loaderAddChild(SVGLoaderHelper helper, SVGElement child) throws SVGElementException
    {
		super.loaderAddChild(helper, child);

//        if (members == null) members = new Vector();
//        members.add(child);
    }

    
    protected void build() throws SVGException
    {
        super.build();
        
        StyleAttribute sty = new StyleAttribute();
        
        String commandList = "";
        if (getPres(sty.setName("d"))) commandList = sty.getStringValue();

    
        //If glyph path was specified, calculate it
        if (commandList != null)
        {
//            StyleAttribute atyleAttrib = getStyle("fill-rule");
            String fillRule = getStyle(sty.setName("fill-rule")) ? sty.getStringValue() : "nonzero";

            PathCommand[] commands = parsePathList(commandList);

//            ExtendedGeneralPath buildPath = new ExtendedGeneralPath(
            GeneralPath buildPath = new GeneralPath(
                fillRule.equals("evenodd") ? GeneralPath.WIND_EVEN_ODD : GeneralPath.WIND_NON_ZERO,
                commands.length);

            BuildHistory hist = new BuildHistory();

            for (int i = 0; i < commands.length; i++)
            {
                PathCommand cmd = commands[i];
                cmd.appendPath(buildPath, hist);
            }

            //Reflect glyph path to put it in user coordinate system
            AffineTransform at = new AffineTransform();
            at.scale(1, -1);
            path = at.createTransformedShape(buildPath);
        }


        //Read glyph spacing info
        if (getPres(sty.setName("horiz-adv-x"))) horizAdvX = sty.getIntValue();

        if (getPres(sty.setName("vert-origin-x"))) vertOriginX = sty.getIntValue();

        if (getPres(sty.setName("vert-origin-y"))) vertOriginY = sty.getIntValue();

        if (getPres(sty.setName("vert-adv-y"))) vertAdvY = sty.getIntValue();
    }

    public Shape getPath()
    {
        return path;
    }

    public void render(Graphics2D g) throws SVGException
    {
        //Do not push or pop stack

        if (path != null) renderShape(g, path);
        
        Iterator it = children.iterator();
        while (it.hasNext())
        {
            SVGElement ele = (SVGElement)it.next();
            if (ele instanceof RenderableElement)
            {
                ((RenderableElement)ele).render(g);
            }
        }

        //Do not push or pop stack
    }

    public int getHorizAdvX()
    {
        if (horizAdvX == -1)
            horizAdvX = ((Font)parent).getHorizAdvX();
        return horizAdvX;
    }

    public int getVertOriginX()
    {
        if (vertOriginX == -1)
            vertOriginX = getHorizAdvX() / 2;
        return vertOriginX;
    }

    public int getVertOriginY()
    {
        if (vertOriginY == -1)
            vertOriginY = ((Font)parent).getFontFace().getAscent();
        return vertOriginY;
    }

    public int getVertAdvY()
    {
        if (vertAdvY == -1)
            vertAdvY = ((Font)parent).getFontFace().getUnitsPerEm();
        return vertAdvY;

    }

    public Shape getShape()
    {
        if (path != null) return shapeToParent(path);
        return null;
    }

    public Rectangle2D getBoundingBox() throws SVGException
    {
        if (path != null) return boundsToParent(includeStrokeInBounds(path.getBounds2D()));
        return null;
    }

    /**
     * Updates all attributes in this diagram associated with a time event.
     * Ie, all attributes with track information.
     * @return - true if this node has changed state as a result of the time
     * update
     */
    public boolean updateTime(double curTime) throws SVGException
    {
        //Fonts can't change
        return false;
    }
}
