//////////////////////////////////////////////////////////////////////
// Jlpr.java
// Printer  class to print other applets
//
// (C) 1996 E.J.Friedman-Hill and Sandia National Labs
//////////////////////////////////////////////////////////////////////

/**
 * Prints applets using the PSGr PostScript Graphics context
 * @author E.J. Friedman-Hill (C)1996
 * @author      ejfried@ca.sandia.gov
 * @author      http://herzberg.ca.sandia.gov
*/

import java.awt.*;
import java.net.*;
import java.io.*;
import java.lang.*;
import java.util.*;

public class Jlpr extends Object implements Runnable {
  
  String host, script, label, file;
  Thread menuThread, printThread;
  Component printThis;
  String fileName;
  /**
    Constructor
    */
  
  public Jlpr(Component printThis, String fileName) {
    this.printThis = printThis;
    this.fileName = fileName;
  }

  public void run() {
    // determine what to print
    if (printThis == null)
      return;
    String psdata;
    try {
      // first get the postscript as a big string.
      ByteArrayOutputStream baos = new ByteArrayOutputStream(1000000);

      // dfs
      // PSGr postscript = new PSGr(baos, getGraphics());
      // At the moment, we want our printed object to fit on
      // a postscript page, so we have to pass in the applet size
        PSGr postscript = new PSGr(baos, printThis.getGraphics()); //, printThis.size());
      
      // paint the applet and the components on top of it, recursively.
        paintInside(printThis, postscript);
        psdata = baos.toString();
    } catch (Throwable t) {
        System.out.println("Error during rendering: "+t);
        return;
    }
    
    file = fileName;
    
    try {
        PrintStream f = new PrintStream(new FileOutputStream(file));
        f.println(psdata);
        f.println("showpage");
        f.close();
        URL u;
        u = new URL("file://" + fileName);
                          // display the postscript in a new frame
        System.out.println("Printing Complete.");
    } catch (Throwable t) {
        System.out.println("Error while saving file: "+fileName+"<<");
        System.out.println(t);
    }
  }
  
  public void paintInside(Component comp, PSGr g) {
    Point p = new Point(0,0);
    p = comp.location();

    // set the origin for this component
    g.translate(p.x, -p.y);

    // draw this component
    System.out.println("Painting: " + comp.toString());
    updateComponent(comp,g);
    
    // now draw this component's children inside its coordinate system
    if (comp instanceof Container) {
      Component[] comps= ((Container) comp).getComponents();
      for (int i=0; i<comps.length; i++)
        paintInside(comps[i], g);
    }

    // restore the coordinate system
    g.translate(-p.x, p.y);
  }

  public void updateComponent(Component c, PSGr g) {

//    g.setBackground(c.getBackground());
//    g.emitThis("%" + c.toString());

    // draw a few special types of Component
    Rectangle b = c.bounds();
    int halfheight = b.height/2;

    if (c instanceof Button) {
      if (c.getFont() != null)
        g.setFont(c.getFont());
      g.setColor(Color.white);
      g.fillRoundRect(0,0,b.width, b.height, 4,4);
      g.setColor(Color.black);
      g.drawRoundRect(0,0,b.width, b.height, 4,4);
      g.drawString(((Button) c).getLabel(), 2, halfheight+3);
    } else if (c instanceof Label) {
      if (c.getFont() != null)
        g.setFont(c.getFont());
      g.setColor(Color.black);
      if (((Label)c).getText() != null)
          g.drawString(((Label) c).getText(), 2, halfheight+3);
    } else if (c instanceof Choice) {
      if (c.getFont() != null)
        g.setFont(c.getFont());
      g.setColor(Color.black);
      g.drawRect(0,0,b.width+1, b.height+1);
      g.setColor(Color.white);
      g.fillRect(0,0,b.width, b.height);
      g.setColor(Color.black);
      g.drawRect(0,0,b.width, b.height);
      g.fillRect(b.width-7,halfheight-1, 6,2);
      g.drawString(((Choice) c).getSelectedItem(), 2, halfheight+3);
    } else if (c instanceof TextComponent) {
      // This one really needs work...
      g.gsave();
      g.clipRect(c.bounds().x, c.bounds().y, c.bounds().width, c.bounds().height);
      if (c.getFont() != null)
        g.setFont(c.getFont());
      g.setColor(Color.white);
      g.fillRect(0,0,b.width, b.height);
      g.setColor(Color.black);
      g.drawRect(0,0,b.width, b.height);
      if (((TextComponent) c).getText() != null)
        g.drawString(((TextComponent) c).getText().trim(), 2, halfheight+3);
      g.grestore();
    } else {
      // let it draw itself
      
      c.update(g);
    }
  }
}