/*
 *Zine Zine Zine Zine Zine Zine Zine
 * a demo program.
 * Implements popups for comic book style messages
 * on top of an image. 
 * uses a crummy form of markup language
 * designed only to be easy to parse with java
 * (read quick n dirty)
 *Zine (more...)
  * an app by Johan van der Hoeven.
  * johan@rosebud.com
  * http://www.rosebud.com/rb/rbhome.html
  * johan_van_der_Hoeven@terc.edu
  * 
  * can be viewed at:
  * http://http://www.fanzine.se/java/jo/zine.html (zine stuff)
  * http://teaparty.terc.edu/java/z/glob.html (network science education research)
*/




import java.awt.*;
import java.io.StreamTokenizer;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URL;  
import java.net.MalformedURLException;
import java.util.Vector;
import java.util.Enumeration; 

class Rect
{
 
public int lX=0;
public int tY=0;
public int rX=0;
public int bY=0;
public Rect(int leftX, int topY, int rightX, int bottomY)
    {lX=leftX; tY=topY; rX=rightX; bY=bottomY;}

public Rect(){};
public boolean isPointInRect(int x, int y)
    {
	if(x<rX&&x>lX&&y>tY&&	y<bY)
	    return true;
	else
	    return false;

    }
public void offset(int dx, int dy)
    {
	lX+=dx;
	rX+=dx;
	tY+=dy;
	bY+=dy;
    };
public int width()	 { return (rX-lX);};
public int height()	 { return (bY-tY);};
} 

class zineFrame
{
public   Point p;
public	Rect r;
public	Vector strvec;	
    /*  add more later...type etc.*/
   
public zineFrame()
    { r = new Rect(); strvec = new Vector(); p =new Point(0, 0);
    };
   
}  
  
/* you may wonder why there is a clipR when it is the same as textR*/
/* this is so that when the popup gets better looking the texrR */
/* will be a part of it */    
class zinePopUp
{
public Point p;   /* anchor */
public Rect clipR; /* area it covers */
public Rect textR; /*area for text*/
public zineFrame xfrm=null;
public Font font;
public FontMetrics fm;
protected int lineHi, charWid;
   

public zinePopUp	(Font f, FontMetrics fm) {
    p= new Point(0, 0); clipR = new Rect(); textR= new Rect();
    //font = new java.awt.Font("TimesRoman", Font.PLAIN, 12);
    this.fm = fm;
    font = f;
    charWid=fm.stringWidth(" ");
    lineHi=fm.getHeight()+2;
};
public boolean doLayout(Rect boundR, zineFrame zf)
    {
		   
	xfrm=zf;
	int wid=0;
	int hi=0;
		    
	for (Enumeration e = xfrm.strvec.elements(); e.hasMoreElements();)
	    {
		hi+=lineHi;

		String tmp=	(String) e.nextElement();

		wid= Math.max(wid, fm.stringWidth(tmp));
				    
					
	    }; 
	wid+=2*charWid;
	textR.bY=xfrm.p.y;
	textR.lX=xfrm.p.x;
	textR.rX=textR.lX+wid;
	textR.tY=textR.bY-hi-lineHi/2;
	doRectMunge(boundR);
	clipR=textR;

	return true;
    };
protected void doRectMunge(Rect boundR)
    {
	int xa=xfrm.p.x-boundR.lX;
	int xb=boundR.rX-xfrm.p.x;
	int ya=xfrm.p.y-boundR.tY;
	int yb=boundR.bY-xfrm.p.y;

	/* check if it fit, if not try moving it. */
		
	if(textR.rX>boundR.rX)
	    {  
				//do a horizontal left shift
		int tmp= Math.min(textR.width(),xa);
		textR.offset(-tmp,0);
	    }
	else
	    if(textR.lX<boundR.lX)
		{
				//do a horizontal right shift
		    int tmp= Math.min(textR.width(),xb);
		    textR.offset(tmp,0);
		}
	/* vertical : (Has bugs! --OK for now....)*/
	if(textR.tY<boundR.tY)
	    {
				//do a vertical down shift
		int tmp= Math.min(textR.height(),ya);
		textR.offset(0,tmp);
	    }
	else
	    if(textR.bY>boundR.bY)
		{
			
				//do a vertical down shift
		    int tmp= Math.min(textR.height(),yb);
		    textR.offset(0,-tmp);
		}

    };
    
public void Draw(Graphics g)
    {
	g.setFont(font);
	g.setColor(Color.lightGray);
	g.fill3DRect(textR.lX, textR.tY, textR.width(), textR.height(),true);
	g.setColor(Color.black);
	int y=textR.tY;
	for (Enumeration e = xfrm.strvec.elements(); e.hasMoreElements();)
	    {
		y+=lineHi;
		g.drawString((String) e.nextElement() , textR.lX+charWid, y);
				   
	    }; 

    };
  
} 
public class Zine extends java.applet.Applet {
        
protected String dana = null;
protected String imgna = null;
protected String shot=null;
protected Image  daimg;
    Rect clipR;
    Vector framevect;
    boolean showhot=false;
	
    zineFrame cur_znfrm=null;
    zinePopUp pop=null;
    Font font;
public void init() {
    font = new java.awt.Font("TimesRoman", Font.PLAIN, 12);
    framevect= new Vector(); 
    //resize(200, 200);
    dana = getParameter("dataurl");
    getFrames();

    imgna = getParameter("imgurl");
    daimg= getImage(getCodeBase(), imgna);
    //if(daimg!=null)
    //resize(daimg.getWidth(this),daimg.getHeight(this));
    //else
    //resize(10, 10);
    shot = getParameter("showhot");

    if(shot!=null)
	if(shot.equals("yes"))
	    showhot=true;
}
	
public void paint(Graphics g) {
    g.drawImage(daimg, 0, 0, this);	
			
    if(showhot) {
	for ( Enumeration ee = framevect.elements(); ee.hasMoreElements();) {
	    zineFrame fr= (zineFrame)ee.nextElement();
	    g.draw3DRect(fr.r.lX, fr.r.tY, fr.r.width(), fr.r.height(),true);
	}
    }
		
    if(pop!=null) {
	pop.Draw(g);	
    }
    g.draw3DRect(0, 0, size().width-1, size().height-1, true);

}   
    /* end paint */

public void update(Graphics g) {
    // Clip to the affected area
    //make sure not outside applet: 
    //(needed else it can paint outside applet --java bug ?)
    //if (clipR != null) {
    //g.clipRect(clipR.lX, clipR.tY, clipR.width(), clipR.height());
    //}
    paint(g);
}
public boolean keyDown(java.awt.Event evt, int k)
    {
	System.out.println("key");
				 
	if(k=='s'||k=='S')
	    {
		showhot=!showhot;
		clipR.lX=0;
		clipR.rX=size().width;
		clipR.tY=0;
		clipR.bY=size().height;
		repaint();
	    }
	return true;
    }
public boolean mouseEnter(java.awt.Event evt)
    { requestFocus();
      return true;
    }

public boolean mouseExit(java.awt.Event evt)
    { 
	if(pop!=null)
	    {
		cur_znfrm=null;
		clipR=pop.clipR;
		pop=null;
		repaint();
	    };
	return true;
	             
    }
public boolean mouseMove(java.awt.Event evt, int x, int y)
    {
					
	boolean change=false;
	if(cur_znfrm==null)
	    {
		for ( Enumeration ee = framevect.elements(); ee.hasMoreElements();)
		    {
			zineFrame fr= (zineFrame)ee.nextElement();
			if(fr.r.isPointInRect(x,y))
			    { change=true;
			    cur_znfrm=fr;
			    pop = new zinePopUp(font, getFontMetrics(font));
			    Rect r=new Rect(0,0,size().width,size().height);
			    pop.doLayout(r,cur_znfrm);
			    clipR=pop.clipR;
			    };
		    };
						
	    }
	else
	    {
		if(!cur_znfrm.r.isPointInRect(x,y))
		    { 
			cur_znfrm=null;
			clipR=pop.clipR;
			pop=null;
			change=true;
		    };
	    };
				 	

	if(change)
	    {

		repaint();


	    };
	return true;
    }  
     
     
     
     
protected void getFrames()
    {
	zineFrame zfrm=null;
				//System.out.println("zine get frames");
		 				
	InputStream is=null;


	try {
	    try {
		is = new URL(getDocumentBase(), dana).openStream();
		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 == '{')
			    { 
									 
				zfrm= new zineFrame(); 
				i=0;
				continue;
			    };
									 
			if(st.ttype == '}')
			    {framevect.addElement(zfrm);
			    continue;
			    }

			if(st.ttype==st.TT_NUMBER)
			    {
				int  n = (int) st.nval;
				switch (i)
				    {
				    case 0:
					zfrm.p.x=n;
					break;
				    case 1:
					zfrm.p.y=n;
					break;
				    case 2:
					zfrm.r.lX=n;
					break;
				    case 3:
					zfrm.r.tY=n;
					break;
				    case 4:
					zfrm.r.rX=n;
					break;
				    case 5:
					zfrm.r.bY=n;
					break;

									 
				    };	 

				i++;
				continue;
			    };

			if(st.ttype=='"')
			    { String tmp= st.sval;
			    zfrm.strvec.addElement(tmp);
			    continue;
			    };

		    };	/* while */
	    } finally {
		if (is != null) {
		    is.close();
		}
	    }

	} catch (MalformedURLException e) {
	} catch (IOException e) {
	}

    };	 /* end getFrames()	*/


}   /* end zine class */