/*
 * mapzine (W) by Markus Baumeister 9'95 (baumeist@informatik.rwth-aachen.de)
 * changed Johan van der Hoeven's "zine"-Applet, so that
 * specifying unregular Pop-Up-Regions is easier.
 */


import Zine;
import browser.Applet;    
import awt.*;
import java.io.StreamTokenizer;
import java.io.InputStream;
import java.io.FileInputStream;
import java.util.Vector;
import java.util.Enumeration; 
import net.www.html.URL;

class mapzineFrame
{
public Vector strvec;
public URL link;
    
    public mapzineFrame()
    {
	strvec=new Vector();
	link=null;
    }
}


class mapzinePopUp extends zinePopUp
{
protected mapzineFrame mzfrm=null;

    public mapzinePopUp(Font font)
    {
	super(font);
    }

    public boolean doLayout(Point where,Rect boundR, mapzineFrame mzf)
    {
	mzfrm=mzf;
	zineFrame zf=new zineFrame();
	zf.p=where;
	zf.strvec=mzf.strvec;
	return(super.doLayout(boundR, zf));
    }

}

class mapzine extends Applet
{

    protected String dana = null;
    protected String imgna = null;
    protected Image  daimg;
    protected DIBitmap selectImage;
    protected int curentSelectColor=0;
    protected int clickedColor=0;
    Vector framevect;
    mapzinePopUp pop=null;
    Font font;
    Rect clipR=null;
    
    
    public void init()
    {
	String selImgname;

	clipR=null;
	pop=null;
	
        font = getFont("TimesRoman", Font.PLAIN, 12);
	framevect= new Vector(); 
	/* resize(200, 200); */
        dana = getAttribute("dataurl");
	getFrames();

/*	System.out.println(dana); */
	
	
	imgna = getAttribute("imgurl");
/*	System.out.println(imgna); */
	daimg= getImage(imgna);

        selImgname= getAttribute("selimgurl");
	URL selImageURL= new URL(documentURL ,selImgname);	
/*	System.out.println(selImageURL); */
        Object result=selImageURL.getContent();
        if(result instanceof DIBitmap)
	{
	    selectImage=(DIBitmap)result;
	}
	else
	{	
	    System.out.println("Wrong name for Selection-Image");
            daimg=null;
	}
/*	System.out.println(selectImage.getDIBitmap().raster);
	System.out.println(selectImage.getDIBitmap().num_colors); */
	

	if(daimg!=null)
	    resize(daimg.width,daimg.height);
        else
	{
	    resize(10, 10);
	    showStatus("The Applet is broken");
	}
	


/*	clipR=new Rect(0,0,width,height);	*/
  }

  public void paint(Graphics g)
  {
      if(clipR!=null)
      {
	   g.clipRect(clipR.lX, clipR.tY, clipR.width(), clipR.height());
	   clipR=null;
      }
      else
      {
          g.clearClip();	      
      }
      
      
      g.drawImage(daimg, 0, 0);

      if(pop!=null)
	  pop.Draw(g);      
  }
    
  public void update(Graphics g)
  {
	paint(g);    
  }
    
  public void mouseDown(int x, int y)
  {
      mouseMove(x,y);      
      clickedColor=curentSelectColor; 
/*      System.out.println(clickedColor); */
  }

  public void mouseUp(int x, int y)
  {
      mouseMove(x,y);      
/*      System.out.println("Mouse Up");
      System.out.println(curentSelectColor);
      System.out.println(clickedColor); */
      if(clickedColor==curentSelectColor && clickedColor>0)
      {	      
      mapzineFrame mz_frm=(mapzineFrame)(framevect.elementAt(clickedColor-1));
	  if(mz_frm.link!=null)
	      showDocument(mz_frm.link);	  
      }
      clickedColor=0;      
  }
    
    
  public void mouseEnter()
  {
     
      if(daimg==null)
	  showStatus("The Applet is broken");
      else
          getFocus();
  }

  public void mouseExit()
  {	
      if(pop!=null)
      {
	  curentSelectColor=0;
	  clipR=pop.clipR;
	  pop=null;
	  repaint();
      }
  };

  public void mouseDrag( int x, int y)
  {
	mouseMove(x,y);
  }
    
    
  public void mouseMove(int x, int y)
  {
  int colornumber=0;
  int half_x=x/2;
  int half_y=y/2;
  
      if(half_x<selectImage.width && half_y<selectImage.height)
      {	  
      short color=selectImage.raster[half_x+half_y*selectImage.width];
      short red=selectImage.red[color];
      short green=selectImage.green[color];
          if(red<0)
	      red=(short)((red&127)+128);      
          if(green<0)
              green=(short)((green&127)+128);

/*          System.out.println(color);
          System.out.println(green); */
      
      
	  colornumber=((red&224)>>2)+((green&224)>>5);	  
      }
      else
          colornumber=0;

      if(colornumber!=curentSelectColor)
      {
/*	  System.out.println("New Color");
	  System.out.println(colornumber);
	  System.out.println(x);
      	  System.out.println(y);
*/	  
	  
	      
          if(colornumber==0 || pop!=null)
	  {
	      if(pop!=null)
	      {
       		  clipR=pop.clipR;
                  pop=null;
		  showStatus("");		  
		  repaint();
	      }
              curentSelectColor=0;	      
          }
          else if(colornumber<=framevect.size())
          {
	      mapzineFrame mz_frm=(mapzineFrame)(framevect.elementAt(colornumber-1));
              pop=new mapzinePopUp(font);
              Rect r=new Rect(0,0,width,height);
	      Point p=new Point(x,y);
	      pop.doLayout(p,r,mz_frm);
              clipR=pop.clipR;
	      curentSelectColor=colornumber;
	      if(mz_frm.link!=null)
	          showStatus("Go to: "+mz_frm.link.toExternalForm());
	      repaint();
          }
	  else /* colornumber>framevect.size */
	  {
	      if(pop!=null)
	      {
       		  clipR=pop.clipR;
                  pop=null;	          
		  repaint();
	      }
              curentSelectColor=colornumber;	      
	  }	  
      }
  }

  protected void getFrames()
  {
  mapzineFrame mzfrm=null;
  InputStream is=null;
  boolean now_url=false;
  
 
      is = new URL(documentURL, dana).openStreamInteractively();
  StreamTokenizer st = new StreamTokenizer(is);

 
      st.eolIsSignificant = false;
      st.commentChar('#');
								
							 	
							 	
  /* parse file --NOT very clean can be improved alot */    
  int i=0;
      while (st.ttype != StreamTokenizer.TT_EOF)
      {
          st.nextToken();
          /* got a new frame: */
          if(st.ttype == '{')
          {  
	      mzfrm= new mapzineFrame(); 
	      i=0;
	      continue;
	  }
									 
	  if(st.ttype == '}')
          {
              framevect.addElement(mzfrm);  
	      continue;
	  }


	  if(st.ttype == '<')
	  {
	      now_url=true;
	      continue;
	  }
	  
	  if(st.ttype == '>')
	  {
	      now_url=false;
	      continue;
	  }
	  
	  if(st.ttype=='"')
	  {
	      String tmp= st.sval;
	      if(now_url)
		  mzfrm.link=new URL(documentURL, tmp);
	      else
	          mzfrm.strvec.addElement(tmp);
              continue;
	  }

      } 	/* while */

  }	 /* end getFrames()	*/
 

}