/*
 * IndexLoadObjectsAntTask.java
 *
 * Created on January 22, 2005, 10:30 AM
 */

package com.kitfox.svg.app.ant;

import java.awt.*;
import java.awt.image.*;
import java.util.*;
import java.util.regex.*;
import java.io.*;
import javax.imageio.*;

//import com.kitfox.util.*;
//import com.kitfox.util.indexedObject.*;

import org.apache.tools.ant.*;
import org.apache.tools.ant.types.*;

import com.kitfox.svg.app.beans.*;
import com.kitfox.svg.*;
import com.kitfox.svg.xml.ColorTable;

/**
 * <p>Translates a group of SVG files into images.</p>
 * 
 * <p>Parameters:</p>
 * <p><ul>
 * <li/>destDir - If present, specifices a directory to write SVG files to.  Otherwise
 * writes images to directory SVG file was found in
 * verbose - If true, prints processing information to the console
 * <li/>format - File format for output images.  The java core javax.imageio.ImageIO
 * class is used for creating images, so format strings will depend on what
 * files your system is configured to handle.  By default, "gif", "jpg" and "png"
 * files are guaranteed to be present.  If omitted, "png" is used by default.
 * <li/>backgroundColor - Optional background color.  Color can be specified as a standard 
 * HTML color.  That is, as the name of a standard color such as "blue" or 
 * "limegreen", using the # notaion as in #ff00ff for magenta, or in rgb format
 * listing the components as in rgb(255, 192, 192) for pink.  If omitted,
 * background is transparent.
 * <li/>antiAlias - If set, shapes are drawn using antialiasing.  Defaults to true.
 * <li/>interpolation - String describing image interpolation alrogithm.  Can
 * be one of "nearest neighbor", "bilinear" or "bicubic".  Defaults to "bicubic".
 * <li/>width - If greater than 0, determines the width of the written image.  Otherwise,
 * the width is obtained from the SVG document.  Defaults to -1;
 * <li/>height - If greater than 0, determines the height of the written image.  Otherwise,
 * the height is obtained from the SVG document.  Defaults to -1.
 * <li/>sizeToFit - If true and the width and height of the output image differ
 * from that of the SVG image, the valid area of the SVG image will be resized 
 * to fit the specified size.
 * <li/>verbose - IF true, prints out diagnostic infromation about processing.  
 * Defaults to false.
 * </ul></p>
 * 
 * Example:
 * &lt;SVGToImage destDir="${index.java}" format="jpg" verbose="true"&gt;
 *    &lt;fileset dir="${dir1}"&gt;
 *        &lt;include name="*.svg"/&gt;
 *    &lt;/fileset&gt;
 *    &lt;fileset dir="${dir2}"&gt;
 *        &lt;include name="*.svg"/&gt;
 *    &lt;/fileset&gt;
 * &lt;/SVGToImage&gt;
 * 
 * 
 * 
 * @author kitfox
 */
public class SVGToImageAntTask extends Task
{
    private ArrayList filesets = new ArrayList();
    boolean verbose = false;
    File destDir;
    private String format = "png";
    Color backgroundColor = null;
    int width = -1;
    int height = -1;
    boolean antiAlias = true;
    String interpolation = "bicubic";
    boolean clipToViewBox = false;
    boolean sizeToFit = true;
    
    /** Creates a new instance of IndexLoadObjectsAntTask */
    public SVGToImageAntTask()
    {
    }
    
    
    public String getFormat()
    {
        return format;
    }
    
    public void setFormat(String format)
    {
        this.format = format;
    }
    
    public void setBackgroundColor(String bgColor)
    {
        this.backgroundColor = ColorTable.parseColor(bgColor);
    }
    
    public void setHeight(int height)
    {
        this.height = height;
    }
    
    public void setWidth(int width)
    {
        this.width = width;
    }
    
    public void setAntiAlias(boolean antiAlias)
    {
        this.antiAlias = antiAlias;
    }
    
    public void setInterpolation(String interpolation)
    {
        this.interpolation = interpolation;
    }
    
    public void setSizeToFit(boolean sizeToFit)
    {
        this.sizeToFit = sizeToFit;
    }
    
    public void setClipToViewBox(boolean clipToViewBox)
    {
        this.clipToViewBox = clipToViewBox;
    }
    
    public void setVerbose(boolean verbose)
    {
        this.verbose = verbose;
    }
    
    public void setDestDir(File destDir)
    {
        this.destDir = destDir;
    }
    
    /**
     * Adds a set of files.
     */
    public void addFileset(FileSet set)
    {
        filesets.add(set);
    }
    
    
    
    public void execute()
    {
        if (verbose) log("Building SVG images");
        
        for (Iterator it = filesets.iterator(); it.hasNext();)
        {
            FileSet fs = (FileSet)it.next();
            FileScanner scanner = fs.getDirectoryScanner(getProject());
            String[] files = scanner.getIncludedFiles();
            
            try
            {
                File basedir = scanner.getBasedir();
                
                if (verbose) log("Scaning " + basedir);
                
                for (int i = 0; i < files.length; i++)
                {
//System.out.println("File " + files[i]);
//System.out.println("BaseDir " + basedir);
                    translate(basedir, files[i]);
                }
            }
            catch (Exception e)
            {
                throw new BuildException(e);
            }
        }
    }
    
    private void translate(File baseDir, String shortName) throws BuildException
    {
        File source = new File(baseDir, shortName);
        
        if (verbose) log("Reading file: " + source);
        
        Matcher matchName = Pattern.compile("(.*)\\.svg", Pattern.CASE_INSENSITIVE).matcher(shortName);
        if (matchName.matches())
        {
            shortName = matchName.group(1);
        }
        shortName += "." + format;
        
        SVGIcon icon = new SVGIcon();
        icon.setSvgURI(source.toURI());
        icon.setAntiAlias(antiAlias);
        if (interpolation.equals("nearest neighbor"))
        {
            icon.setInterpolation(SVGIcon.INTERP_NEAREST_NEIGHBOR);
        }
        else if (interpolation.equals("bilinear"))
        {
            icon.setInterpolation(SVGIcon.INTERP_BILINEAR);
        }
        else if (interpolation.equals("bicubic"))
        {
            icon.setInterpolation(SVGIcon.INTERP_BICUBIC);
        }
        
        int iconWidth = width > 0 ? width : icon.getIconWidth();
        int iconHeight = height > 0 ? height : icon.getIconHeight();
        icon.setClipToViewbox(clipToViewBox);
        icon.setPreferredSize(new Dimension(iconWidth, iconHeight));
        icon.setScaleToFit(sizeToFit);
        BufferedImage image = new BufferedImage(iconWidth, iconHeight, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = image.createGraphics();
        
        if (backgroundColor != null)
        {
            g.setColor(backgroundColor);
            g.fillRect(0, 0, iconWidth, iconHeight);
        }
        
        g.setClip(0, 0, iconWidth, iconHeight);
//        g.fillRect(10, 10, 100, 100);
        icon.paintIcon(null, g, 0, 0);
        g.dispose();
        
        File outFile = destDir == null ? new File(baseDir, shortName) : new File(destDir, shortName);
        if (verbose) log("Writing file: " + outFile);
        
        try
        {
            ImageIO.write(image, format, outFile);
        }
        catch (IOException e)
        {
            log("Error writing image: " + e.getMessage());
            throw new BuildException(e);
        }
        
        
        SVGCache.getSVGUniverse().clear();
    }
    
}