/*
 *  JFLAP - Formal Languages and Automata Package
 * 
 * 
 *  Susan H. Rodger
 *  Computer Science Department
 *  Duke University
 *  August 27, 2009

 *  Copyright (c) 2002-2009
 *  All rights reserved.

 *  JFLAP is open source software. Please see the LICENSE for terms.
 *
 */




package gui.action;

import gui.environment.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.*;
import java.io.*;
import org.apache.batik.svggen.SVGGraphics2D;
import org.apache.batik.svggen.SVGGeneratorContext;
import org.apache.batik.dom.svg.SVGDOMImplementation;
import org.apache.batik.swing.svg.SVGFileFilter;
import org.w3c.dom.Document;
import debug.EDebug;

/**
 * This action handles saving structures as a vector or raster image,
 * from which we can't retrieve the original structure.  It will attempt to
 * export the currently active component in the environment.
 * 
 * @author Andrew Ross, Henry Qin
 */

public class ExportAction extends RestrictedAction {
    /**
     * Instantiates a new <CODE>ExportAction</CODE>.
     * @param environment
     */
    public ExportAction(Environment environment) {
    super("Export to SVG", null);
    this.environment = environment;
    putValue(ACCELERATOR_KEY, KeyStroke.getKeyStroke
         (KeyEvent.VK_E, MAIN_MENU_MASK));
    }

    /**
     * This will trigger the export.
     * @param e the action event
     */
    public void actionPerformed(ActionEvent e) {
    JComponent c=(JComponent)environment.getActive();
    SVGDOMImplementation domImpl =
    (SVGDOMImplementation)SVGDOMImplementation.getDOMImplementation();
    
    String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;
    Document document = domImpl.createDocument(svgNS, "svg", null);
    
    SVGGeneratorContext cntx = SVGGeneratorContext.createDefault(document);
    cntx.setComment("Generated by JFLAP using Batik SVG Generator");
    cntx.setEmbeddedFontsOn(true);
    
    SVGGraphics2D svgGenerator = new SVGGraphics2D(cntx, false);
    
    c.print(svgGenerator);

    Universe.CHOOSER.resetChoosableFileFilters();
    Universe.CHOOSER.setAcceptAllFileFilterUsed(false);
    Universe.CHOOSER.addChoosableFileFilter(new SVGFileFilter());
    int result = Universe.CHOOSER.showSaveDialog(c);
    while (result == JFileChooser.APPROVE_OPTION) {
        File file = Universe.CHOOSER.getSelectedFile();

        if (!new SVGFileFilter().accept(file))
            file = new File(file.getAbsolutePath() + ".svg");


        if (file.exists()) {
            int confirm = JOptionPane.showConfirmDialog(Universe.CHOOSER, "File exists. Shall I overwrite?", "FILE OVERWRITE ATTEMPTED", JOptionPane.YES_NO_OPTION);
            if (confirm == JOptionPane.NO_OPTION){ 
                result = Universe.CHOOSER.showSaveDialog(c);
                continue;
            }
        }

        try {
            Writer out = new OutputStreamWriter(new FileOutputStream(file),
                        "UTF-8");
            svgGenerator.stream(out, true);
            return;
        }
        catch (IOException ioe) {
            JOptionPane.showMessageDialog(c,
            "Export failed with error:\n"+ioe.getMessage(),
            "Export failed", JOptionPane.ERROR_MESSAGE);
            return;
        }
    }
    }

    /** The environment. */
    private Environment environment;

}