import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
public class main {


static BWImage img;
static ImageSurface is2;
static float threshold = 0.9f;

public static void main(String[] args) throws Exception {
  img = loadBWImage("#1005702");
  update();
}

static void update() {
  float[] f = columnBrightnesses(img);
  quickShowZoomedImage(img.toRGB());
  //showZoomedImage(brightnessesAsImage(f).toRGB());
  List<Streak> streaks = makeStreaks(f, threshold);
  //printStruct(f);
  //printStruct(streaks);
  print("Threshold: " + threshold + ", streaks: " + l(streaks));
  RGBImage vis = visualizeStreaks(img, streaks).toRGB();
  if (is2 == null) {
    is2 = showZoomedImage(vis);
    addToWindowAndPack(is2, liveSlider(threshold/10000f*9999f, new Object() { void get(float x) { 
      threshold = x*10000f/9999f;
      update();
     }
  public String toString() { return "threshold = x*10000f/9999f;\n      update();"; }}));
  } else
    is2.setImage(vis);
}

// f: voidfunc(float)
static JSlider liveSlider(float def, final Object f) {
  final int max = 9999;
  final JSlider slider = new JSlider(0, max, iround(def*max));
  slider.addChangeListener(new ChangeListener() {
    int lastValue = slider.getValue();
    public void stateChanged(ChangeEvent e) {
      int value = slider.getValue();
      if (value != lastValue) {
        lastValue = value;
        pcallF(f, value/(float) max);
      }
    }
  });
  return slider;
}

static class Streak {
  int from, to; // to = exclusive
  
  Streak() {}
  Streak(int from, int to) {
  this.to = to;
  this.from = from;}
}

static List<Streak> makeStreaks(float[] f, float threshold) {
  List<Streak> l = new ArrayList<Streak>();
  int j = -1;
  for (int i = 0; i < l(f); i++)
    if (f[i] < threshold) { // start / continue streak
      if (j < 0) j = i; 
    } else {
      if (j >= 0) { // end streak
        l.add(new Streak(j, i));
        j = -1;
      }
    }
  if (j >= 0)
    l.add(new Streak(j, l(f)));
  return l;
}

static float[] columnBrightnesses(BWImage img) {
  int w = img.getWidth(), h = img.getHeight();
  float[] f = new float[w];
  for (int x = 0; x < w; x++)
    f[x] = (float) img.clip(x, 0, 1, h).averageBrightness();
  return f;
}

static BWImage brightnessesAsImage(float[] f) {
  int w = f.length, h = 20;
  BWImage img = new BWImage(w, h);
  for (int y = 0; y < h; y++) for (int x = 0; x < w; x++) img.setPixel(x, y, f[x]);
  return img;
}

static float[] streaksToFloats(int w, List<Streak> l) {
  float[] f = new float[w];
  for (Streak s : l)
    for (int i = s.from; i < s.to; i++)
      f[i] = 1f;
  return f;
}

/*static streaksToGaps(int w, L<Streak> l) {
  ret makeStreaks(streaksToFloats(w, l), 0.5f);
}*/

/*static BWImage visualizeStreaks(BWImage img, L<Streak> streaks) {
  int gap = 5;
  float gapColor = 0.5f;
  int w = img.getWidth(), h = img.getHeight();
  L<Streak> gaps = streaksToGaps(w, streaks);
  int n = l(gaps);
  int w2 = w+n*gap;
  BWImage im = new BWImage(w2, gapColor);
  
  copyBWImage(img, 
  ret im;
}*/

static BWImage visualizeStreaks(BWImage img, List<Streak> streaks) {
  float gapColor = 0.5f;
  int w = img.getWidth(), h = img.getHeight();
  BWImage im = new BWImage(w, h*2, gapColor);
  float[] f = streaksToFloats(w, streaks);
  for (int x = 0; x < w; x++)
    copyBWImage(img, x, 0, im, x, (int) (f[x]*h), 1, h);
  return im;
}

static void copyBWImage(BWImage src, int srcX, int srcY, BWImage dst, int dstX, int dstY) {
  copyBWImage(src, srcX, srcY, dst, dstX, dstY, src.getWidth()-srcX, src.getHeight()-srcY);
}

static void copyBWImage(BWImage src, int srcX, int srcY, BWImage dst, int dstX, int dstY, int w, int h) {
  w = min(w, dst.getWidth()-dstX);
  h = min(h, dst.getHeight()-dstY);
  w = min(w, src.getWidth()-srcX);
  h = min(h, src.getHeight()-srcY);
  for (int y = 0; y < h; y++)
    for (int x = 0; x < w; x++)
      dst.setByte(dstX+x, dstY+y, src.getByte(srcX+x, srcY+y));
}

static volatile StringBuffer local_log = new StringBuffer(); // not redirected
static volatile StringBuffer print_log = local_log; // might be redirected, e.g. to main bot

// in bytes - will cut to half that
static volatile int print_log_max = 1024*1024;
static volatile int local_log_max = 100*1024;
//static int print_maxLineLength = 0; // 0 = unset

static boolean print_silent; // total mute if set

static void print() {
  print("");
}

// slightly overblown signature to return original object...
static <A> A print(A o) {
  ping();
  if (print_silent) return o;
  String s = String.valueOf(o) + "\n";
  print_noNewLine(s);
  return o;
}

static void print_noNewLine(String s) {
  // TODO if (print_maxLineLength != 0)
  StringBuffer loc = local_log;
  StringBuffer buf = print_log;
  int loc_max = print_log_max;
  if (buf != loc && buf != null) {
    print_append(buf, s, print_log_max);
    loc_max = local_log_max;
  }
  if (loc != null) 
    print_append(loc, s, loc_max);
  System.out.print(s);
}

static void print(long l) {
  print(String.valueOf(l));
}

static void print(char c) {
  print(String.valueOf(c));
}

static void print_append(StringBuffer buf, String s, int max) {
  synchronized(buf) {
    buf.append(s);
    max /= 2;
    if (buf.length() > max) try {
      int newLength = max/2;
      int ofs = buf.length()-newLength;
      String newString = buf.substring(ofs);
      buf.setLength(0);
      buf.append("[...] ").append(newString);
    } catch (Exception e) {
      buf.setLength(0);
    }
  }
}
static int iround(double d) {
  return (int) Math.round(d);
}
static void addToWindowAndPack(Component c, Component toAdd) {
  addToWindow(c, toAdd);
  packFrame(c);
}
static ImageSurface quickShowZoomedImage_is;
static boolean quickShowZoomedImage_firstTime = true;

static void quickShowZoomedImage(final RGBImage image) {
  swingNowOrLater(new Runnable() { public void run() { try { 
    quickShowZoomedImage_is = showImage(image, quickShowZoomedImage_is);
    if (quickShowZoomedImage_firstTime) {
      quickShowZoomedImage_is.setZoom(2);
      packFrame(quickShowZoomedImage_is);
      quickShowZoomedImage_firstTime = false;
    }
  
} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); } } });
}
static ImageSurface showZoomedImage(final RGBImage image) {
  return (ImageSurface) swingAndWait(new Object() { Object get() { 
    ImageSurface is = showImage(image);
    is.setZoom(2);
    packFrame(is);
    return is;
   }
  public String toString() { return "ImageSurface is = showImage(image);\r\n    is.setZoom(2);\r\n    packFrame(is);\r\n    ret is;"; }});
}
static Object pcallF(Object f, Object... args) {
  return pcallFunction(f, args);
}
static int l(Object[] a) { return a == null ? 0 : a.length; }
static int l(boolean[] a) { return a == null ? 0 : a.length; }
static int l(byte[] a) { return a == null ? 0 : a.length; }
static int l(int[] a) { return a == null ? 0 : a.length; }
static int l(float[] a) { return a == null ? 0 : a.length; }
static int l(char[] a) { return a == null ? 0 : a.length; }
static int l(Collection c) { return c == null ? 0 : c.size(); }
static int l(Map m) { return m == null ? 0 : m.size(); }
static int l(CharSequence s) { return s == null ? 0 : s.length(); } 

static int l(Object o) {
  return l((List) o); // incomplete
}

static BWImage loadBWImage(String snippetIDOrURL) {
  return new BWImage(loadBufferedImage(snippetIDOrURL));
}



static int packFrame_minw = 150, packFrame_minh = 50;

static JFrame packFrame(Component c) {
  JFrame frame = getFrame(c);
  if (frame == null) return null;
  frame.pack();
  int maxW = getScreenWidth()-50, maxH = getScreenHeight()-50;
  frame.setSize(
    min(maxW, max(frame.getWidth(), packFrame_minw)),
    min(maxH, max(frame.getHeight(), packFrame_minh)));
  return frame;
}
static volatile boolean ping_pauseAll;
static int ping_sleep = 100; // poll pauseAll flag every 100
static volatile boolean ping_anyActions;
static Map<Thread, Object> ping_actions = synchroMap(new WeakHashMap());

// returns true if it did anything
static boolean ping() { try {
 
  if (ping_pauseAll && !isAWTThread()) {
    do
      Thread.sleep(ping_sleep);
    while (ping_pauseAll);
    return true;
  }
  
  if (ping_anyActions) {
    Object action;
    synchronized(mc()) {
      action = ping_actions.get(currentThread());
      if (action instanceof Runnable)
        ping_actions.remove(currentThread());
      if (ping_actions.isEmpty()) ping_anyActions = false;
    }
    
    if (action instanceof Runnable)
      ((Runnable) action).run();
    else if (eq(action, "cancelled"))
      throw fail("Thread cancelled.");
  }
  
  return false;

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static String showImage_defaultIcon = "#1004230"; // "#1004227";

static ImageSurface showImage(String snippetIDOrURL, String title) {
  return showImage(loadImage(snippetIDOrURL), title);
}

static ImageSurface showImage(String title, BufferedImage img) {
  return showImage(img, title);
}

static ImageSurface showImage(final BufferedImage img, final String title) {
  return (ImageSurface) swing(new Object() { Object get() { 
    ImageSurface is = showImage(img);
    getFrame(is).setTitle(title);
    return is;
   }
  public String toString() { return "ImageSurface is = showImage(img);\r\n    getFrame(is).setTitle(title);\r\n    return is;"; }});
}

static ImageSurface showImage(final BufferedImage img) {
  return (ImageSurface) swing(new Object() { Object get() { 
    ImageSurface is = new ImageSurface(img);
    JFrame frame = showPackedFrame(new JScrollPane(is));
    moveToTopRightCorner(frame);
    frameIcon(frame, showImage_defaultIcon);
    return is;
   }
  public String toString() { return "ImageSurface is = new ImageSurface(img);\r\n    JFrame frame = showPackedFrame(new JScrollPane(is));\r\n    moveToTopRightCorner(frame);\r\n    frameIcon(frame, showImage_defaultIcon);\r\n    return is;"; }});
}

static ImageSurface showImage(RGBImage img) {
  return showImage(img.getBufferedImage());
}

static ImageSurface showImage(RGBImage img, String title) {
  ImageSurface is = showImage(img.getBufferedImage());
  getFrame(is).setTitle(title);
  return is;
}

static ImageSurface showImage(String imageID) {
  return showImage(loadImage(imageID));
}

static ImageSurface showImage(RGBImage img, ImageSurface surface) {
  if (surface == null)
    return showImage(img);
  else {
    surface.setImage(img);
    return surface;
  }
}
static int min(int a, int b) {
  return Math.min(a, b);
}

static long min(long a, long b) {
  return Math.min(a, b);
}

static double min(double a, double b) {
  return Math.min(a, b);
}

static double min(double[] c) {
  double x = Double.MAX_VALUE;
  for (double d : c) x = Math.min(x, d);
  return x;
}

static byte min(byte[] c) {
  byte x = 127;
  for (byte d : c) if (d < x) x = d;
  return x;
}
static void addToWindow(Component c, Component toAdd) {
  JFrame frame = getFrame(c);
  Container cp = frame.getContentPane();

  JPanel newCP = new JPanel();
  newCP.setLayout(new BorderLayout());
  newCP.add(BorderLayout.CENTER, cp);
  newCP.add(BorderLayout.SOUTH, toAdd);
  
  frame.setContentPane(newCP);
  
  // magic combo to actually relayout and repaint
  frame.revalidate();
  frame.repaint();
}
static boolean loadBufferedImage_useImageCache = true;

static BufferedImage loadBufferedImage(String snippetIDOrURL) { try {
 
  if (snippetIDOrURL == null) return null;
  if (isURL(snippetIDOrURL))
    return ImageIO.read(new URL(snippetIDOrURL));

  if (!isSnippetID(snippetIDOrURL)) throw fail("Not a URL or snippet ID: " + snippetIDOrURL);
  String snippetID = "" + parseSnippetID(snippetIDOrURL);
  
try {
  File dir = getCacheProgramDir("Image-Snippets");
  if (loadBufferedImage_useImageCache) {
    dir.mkdirs();
    File file = new File(dir, snippetID + ".png");
    if (file.exists() && file.length() != 0)
      try {
        return ImageIO.read(file);
      } catch (Throwable e) {
        e.printStackTrace();
        // fall back to loading from sourceforge
      }
  }

  String imageURL = snippetImageURL(snippetID);
  System.err.println("Loading image: " + imageURL);
  BufferedImage image = ImageIO.read(new URL(imageURL));

  if (loadBufferedImage_useImageCache) {
    File tempFile = new File(dir, snippetID + ".tmp." + System.currentTimeMillis());
    ImageIO.write(image, "png", tempFile);
    tempFile.renameTo(new File(dir, snippetID + ".png"));
    //Log.info("Cached image.");
  }

  //Log.info("Loaded image.");
  return image;
 } catch (IOException e) {
  throw new RuntimeException(e);
 }

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static BufferedImage loadBufferedImage(File file) { try {
 
  return file.isFile() ? ImageIO.read(file) : null;

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static Object pcallFunction(Object f, Object... args) {
  try { /* pcall 1*/  return callFunction(f, args); /* pcall 2 */ } catch (Throwable __e) { printStackTrace(__e); } return null;
}
static void swingAndWait(Runnable r) { try {
 
  if (isAWTThread())
    r.run();
  else
    EventQueue.invokeAndWait(r);

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static Object swingAndWait(final Object f) {
  if (isAWTThread())
    return callF(f);
  else {
    final Var result = new Var();
    swingAndWait(new Runnable() { public void run() { try { 
      result.set(callF(f));
    
} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); } } });
    return result.get();
  }
}


static Map synchroMap() {
  return synchroHashMap();
}

static <A, B> Map<A, B> synchroMap(Map<A, B> map) {
  return Collections.synchronizedMap(map);
}
static JFrame getFrame(Object o) {
  if (!(o instanceof Component)) return null;
  Component c = (Component) o;
  while (c != null) {
    if (c instanceof JFrame) return (JFrame) c;
    c = c.getParent();
  }
  return null;
}
static Object callF(Object f, Object... args) {
  return callFunction(f, args);
}
static Object callFunction(Object f, Object... args) {
  if (f == null) return null;
  if (f instanceof Runnable) {
    ((Runnable) f).run();
    return null;
  } else if (f instanceof String)
    return call(mc(), (String) f, args);
  else
    return call(f, "get", args);
  //else throw fail("Can't call a " + getClassName(f));
}
static int getScreenWidth() {
  return getScreenSize().width;
}
static File getCacheProgramDir() {
  return getCacheProgramDir(getProgramID());
}

static File getCacheProgramDir(String snippetID) {
  return new File(userHome(), "JavaX-Caches/" + formatSnippetIDOpt(snippetID));
}
  public static boolean isSnippetID(String s) {
    try {
      parseSnippetID(s);
      return true;
    } catch (RuntimeException e) {
      return false;
    }
  }
  static RGBImage loadImage(String snippetIDOrURL) {
    return new RGBImage(loadBufferedImage(snippetIDOrURL));
  }

public static long parseSnippetID(String snippetID) {
  long id = Long.parseLong(shortenSnippetID(snippetID));
  if (id == 0) throw fail("0 is not a snippet ID");
  return id;
}
static Object mc() {
  return getMainClass();
}
static boolean isURL(String s) {
  return s.startsWith("http://") || s.startsWith("https://");
}
static boolean isAWTThread() {
  return isTrue(callOpt(getClass("javax.swing.SwingUtilities"), "isEventDispatchThread"));
}
static JFrame showPackedFrame(String title, Component contents) {
  return packFrame(showFrame(title, contents));
}

static JFrame showPackedFrame(Component contents) {
  return packFrame(showFrame(contents));
}
static Thread currentThread() {
  return Thread.currentThread();
}
static int max(int a, int b) {
  return Math.max(a, b);
}

static int max(int a, int b, int c) {
  return max(max(a, b), c);
}

static long max(int a, long b) {
  return Math.max((long) a, b);
}

static long max(long a, long b) {
  return Math.max(a, b);
}

static double max(int a, double b) {
  return Math.max((double) a, b);
}

static float max(float a, float b) {
  return Math.max(a, b);
}

static int max(Collection<Integer> c) {
  int x = Integer.MIN_VALUE;
  for (int i : c) x = max(x, i);
  return x;
}

static double max(double[] c) {
  if (c.length == 0) return Double.MIN_VALUE;
  double x = c[0];
  for (int i = 1; i < c.length; i++) x = Math.max(x, c[i]);
  return x;
}

static byte max(byte[] c) {
  byte x = -128;
  for (byte d : c) if (d > x) x = d;
  return x;
}
 static String snippetImageURL(String snippetID) {
    long id = parseSnippetID(snippetID);
    String url;
    if (id == 1000010 || id == 1000012)
      url = "http://tinybrain.de:8080/tb/show-blobimage.php?id=" + id;
    else
      url = "http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_" + id
        + "&contentType=image/png";
    return url;
  }
static boolean eq(Object a, Object b) {
  if (a == null) return b == null;
  if (a.equals(b)) return true;
  if (a instanceof BigInteger) {
    if (b instanceof Integer) return a.equals(BigInteger.valueOf((Integer) b));
    if (b instanceof Long) return a.equals(BigInteger.valueOf((Long) b));
  }
  return false;
}
static int getScreenHeight() {
  return getScreenSize().height;
}
  static RuntimeException fail() {
    throw new RuntimeException("fail");
  }
  
  static RuntimeException fail(Object msg) {
    throw new RuntimeException(String.valueOf(msg));
  }
  
  static RuntimeException fail(String msg) {
    throw new RuntimeException(unnull(msg));
  }
   
  // disabled for now to shorten some programs 
  /*static RuntimeException fail(S msg, O... args) {
    throw new RuntimeException(format(msg, args));
  }*/
static Object swing(Object f) {
  return swingAndWait(f);
}
static int moveToTopRightCorner_inset = 20;

static void moveToTopRightCorner(Window w) {
  w.setLocation(getScreenSize().width-w.getWidth()-moveToTopRightCorner_inset, moveToTopRightCorner_inset);
}

static JFrame frameIcon(JFrame frame, String imageID) {
  return setFrameIconLater(frame, imageID);
}


static Class<?> getClass(String name) {
  try {
    return Class.forName(name);
  } catch (ClassNotFoundException e) {
    return null;
  }
}

static Class getClass(Object o) {
  return o instanceof Class ? (Class) o : o.getClass();
}

static Class getClass(Object realm, String name) { try {
 
  try {
    return getClass(realm).getClassLoader().loadClass(classNameToVM(name));
  } catch (ClassNotFoundException e) {
    return null;
  }

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static String shortenSnippetID(String snippetID) {
  if (snippetID.startsWith("#"))
    snippetID = snippetID.substring(1);
  String httpBlaBla = "http://tinybrain.de/";
  if (snippetID.startsWith(httpBlaBla))
    snippetID = snippetID.substring(httpBlaBla.length());
  return "" + parseLong(snippetID);
}
static JFrame setFrameIconLater(Component c, final String imageID) {
  final JFrame frame = getFrame(c);
  if (frame != null)
    { /*nt*/ Thread _t_0 = new Thread("Loading Icon") {
public void run() { /* in run */ try { /* pcall 1*/  /* in thread */ 
  
      final Image i = imageIcon(imageID).getImage();
      swingLater(new Runnable() { public void run() { try { 
        frame.setIconImage(i);
      
} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); } } });
    /* in thread */ /* pcall 2 */ } catch (Throwable __e) { printStackTrace(__e); } /* in run */ }
};
_t_0.start(); }
  return frame;
}
static String programID;

static String getProgramID() {
  return nempty(programID) ? formatSnippetID(programID) : "?";
}

// TODO: ask JavaX instead
static String getProgramID(Class c) {
  String id = (String) getOpt(c, "programID");
  if (nempty(id))
    return formatSnippetID(id);
  return "?";
}

static String getProgramID(Object o) {
  return getProgramID(getMainClass(o));
}
static Object callOpt(Object o) {
  if (o == null) return null;
  return callF(o);
}

static Object callOpt(Object o, String method, Object... args) {
  try {
    if (o == null) return null;
    if (o instanceof Class) {
      Method m = callOpt_findStaticMethod((Class) o, method, args, false);
      if (m == null) return null;
      m.setAccessible(true);
      return m.invoke(null, args);
    } else {
      Method m = callOpt_findMethod(o, method, args, false);
      if (m == null) return null;
      m.setAccessible(true);
      return m.invoke(o, args);
    }
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

static Method callOpt_findStaticMethod(Class c, String method, Object[] args, boolean debug) {
  Class _c = c;
  while (c != null) {
    for (Method m : c.getDeclaredMethods()) {
      if (debug)
        System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
      if (!m.getName().equals(method)) {
        if (debug) System.out.println("Method name mismatch: " + method);
        continue;
      }

      if ((m.getModifiers() & Modifier.STATIC) == 0 || !callOpt_checkArgs(m, args, debug))
        continue;

      return m;
    }
    c = c.getSuperclass();
  }
  return null;
}

static Method callOpt_findMethod(Object o, String method, Object[] args, boolean debug) {
  Class c = o.getClass();
  while (c != null) {
    for (Method m : c.getDeclaredMethods()) {
      if (debug)
        System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
      if (m.getName().equals(method) && callOpt_checkArgs(m, args, debug))
        return m;
    }
    c = c.getSuperclass();
  }
  return null;
}

private static boolean callOpt_checkArgs(Method m, Object[] args, boolean debug) {
  Class<?>[] types = m.getParameterTypes();
  if (types.length != args.length) {
    if (debug)
      System.out.println("Bad parameter length: " + args.length + " vs " + types.length);
    return false;
  }
  for (int i = 0; i < types.length; i++)
    if (!(args[i] == null || isInstanceX(types[i], args[i]))) {
      if (debug)
        System.out.println("Bad parameter " + i + ": " + args[i] + " vs " + types[i]);
      return false;
    }
  return true;
}


static String unnull(String s) {
  return s == null ? "" : s;
}

static <A> List<A> unnull(List<A> l) {
  return l == null ? emptyList() : l;
}

static <A> Iterable<A> unnull(Iterable<A> i) {
  return i == null ? emptyList() : i;
}

static Object[] unnull(Object[] a) {
  return a == null ? new Object[0] : a;
}

static BitSet unnull(BitSet b) {
  return b == null ? new BitSet() : b;
}
static String _userHome;
static String userHome() {
  if (_userHome == null) {
    if (isAndroid())
      _userHome = "/storage/sdcard0/";
    else
      _userHome = System.getProperty("user.home");
    //System.out.println("userHome: " + _userHome);
  }
  return _userHome;
}

static File userHome(String path) {
  return new File(userDir(), path);
}
static Dimension getScreenSize() {
  return Toolkit.getDefaultToolkit().getScreenSize();
}
static String formatSnippetIDOpt(String s) {
  return isSnippetID(s) ? formatSnippetID(s) : s;
}
static JFrame showFrame() {
  return makeFrame();
}

static JFrame showFrame(Object content) {
  return makeFrame(content);
}

static JFrame showFrame(String title) {
  return makeFrame(title);
}

static JFrame showFrame(String title, Object content) {
  return makeFrame(title, content);
}

static JFrame showFrame(JFrame frame) {
  if (frameTooSmall(frame)) frameStandardSize(frame);
  frame.setVisible(true);
  return frame;
}

// make or update frame
static JFrame showFrame(String title, Object content, JFrame frame) {
  if (frame == null)
    return showFrame(title, content);
  else {
    frame.setTitle(title);
    setFrameContents(frame, content);
    return frame;
  }
}
static Class getMainClass() {
  return main.class;
}

static Class getMainClass(Object o) { try {
 
  return (o instanceof Class ? (Class) o : o.getClass()).getClassLoader().loadClass("main");

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
  static Object call(Object o) {
    return callFunction(o);
  }
  
  // varargs assignment fixer for a single string array argument
  static Object call(Object o, String method, String[] arg) {
    return call(o, method, new Object[] {arg});
  }
  
  static Object call(Object o, String method, Object... args) {
    try {
      if (o instanceof Class) {
        Method m = call_findStaticMethod((Class) o, method, args, false);
        m.setAccessible(true);
        return m.invoke(null, args);
      } else {
        Method m = call_findMethod(o, method, args, false);
        m.setAccessible(true);
        return m.invoke(o, args);
      }
    } catch (Exception e) {
      throw e instanceof RuntimeException ? (RuntimeException) e : new RuntimeException(e);
    }
  }

  static Method call_findStaticMethod(Class c, String method, Object[] args, boolean debug) {
    Class _c = c;
    while (c != null) {
      for (Method m : c.getDeclaredMethods()) {
        if (debug)
          System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
        if (!m.getName().equals(method)) {
          if (debug) System.out.println("Method name mismatch: " + method);
          continue;
        }

        if ((m.getModifiers() & Modifier.STATIC) == 0 || !call_checkArgs(m, args, debug))
          continue;

        return m;
      }
      c = c.getSuperclass();
    }
    throw new RuntimeException("Method '" + method + "' (static) with " + args.length + " parameter(s) not found in " + _c.getName());
  }

  static Method call_findMethod(Object o, String method, Object[] args, boolean debug) {
    Class c = o.getClass();
    while (c != null) {
      for (Method m : c.getDeclaredMethods()) {
        if (debug)
          System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
        if (m.getName().equals(method) && call_checkArgs(m, args, debug))
          return m;
      }
      c = c.getSuperclass();
    }
    throw new RuntimeException("Method '" + method + "' (non-static) with " + args.length + " parameter(s) not found in " + o.getClass().getName());
  }

  private static boolean call_checkArgs(Method m, Object[] args, boolean debug) {
    Class<?>[] types = m.getParameterTypes();
    if (types.length != args.length) {
      if (debug)
        System.out.println("Bad parameter length: " + args.length + " vs " + types.length);
      return false;
    }
    for (int i = 0; i < types.length; i++)
      if (!(args[i] == null || isInstanceX(types[i], args[i]))) {
        if (debug)
          System.out.println("Bad parameter " + i + ": " + args[i] + " vs " + types[i]);
        return false;
      }
    return true;
  }


// hmm, this shouldn't call functions really. That was just
// for coroutines.
static boolean isTrue(Object o) {
  if (o instanceof Boolean)
    return ((Boolean) o).booleanValue();
  if (o == null) return false;
  return ((Boolean) callF(o)).booleanValue();
}

static boolean isTrue(Object pred, Object arg) {
  return booleanValue(callF(pred, arg));
}
static Map synchroHashMap() {
  return Collections.synchronizedMap(new HashMap());
}



static boolean frameTooSmall(JFrame frame) {
  return frame.getWidth() < 100 || frame.getHeight() < 50;
}
static JFrame makeFrame() {
  return makeFrame((Component) null);
}

static JFrame makeFrame(Object content) {
  return makeFrame(programTitle(), content);
}

static JFrame makeFrame(String title) {
  return makeFrame(title, null);
}

static JFrame makeFrame(String title, Object content) {
  return makeFrame(title, content, true);
}

static JFrame makeFrame(String title, Object content, boolean showIt) {
  JFrame frame = new JFrame(title);
  if (content != null)
    frame.getContentPane().add(wrap(content));
  frame.setBounds(300, 100, 500, 400);
  if (showIt)
    frame.setVisible(true);
  //callOpt(content, "requestFocus");
  //exitOnFrameClose(frame);
  
  // standard right-click behavior on titles
  if (isSubstanceLAF())
    onTitleRightClick(frame,
      //r { showConsole(); }
      new Object() { void get(MouseEvent e) { 
        if (!e.isPopupTrigger()) return;
        JPopupMenu menu = new JPopupMenu();

        menu.add(jmenuItem("Restart Program", new Runnable() { public void run() { try {  restart() ;
} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); } } }));
        menu.add(jmenuItem("Show Console", new Runnable() { public void run() { try {  showConsole() ;
} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); } } }));

        menu.show(e.getComponent(), e.getX(), e.getY());
       }
  public String toString() { return "if (!e.isPopupTrigger()) ret;\r\n        JPopupMenu menu = new JPopupMenu();\r\n\r\n        menu.add(jmenuItem(\"Restart Program\", r { restart() }));\r\n        menu.add(jmenuItem(\"Show Console\", r { showConsole() }));\r\n\r\n        menu.show(e.getComponent(), e.getX(), e.getY());"; }});
  return frame;
}
static void setFrameContents(JFrame frame, Object contents) {
  frame.getContentPane().removeAll();
  frame.getContentPane().add(wrap(contents));
  revalidate(frame);
}
static String formatSnippetID(String id) {
  return "#" + parseSnippetID(id);
}

static String formatSnippetID(long id) {
  return "#" + id;
}
// extended over Class.isInstance() to handle primitive types
static boolean isInstanceX(Class type, Object arg) {
  if (type == boolean.class) return arg instanceof Boolean;
  if (type == int.class) return arg instanceof Integer;
  if (type == long.class) return arg instanceof Long;
  if (type == float.class) return arg instanceof Float;
  if (type == short.class) return arg instanceof Short;
  if (type == char.class) return arg instanceof Character;
  if (type == byte.class) return arg instanceof Byte;
  if (type == double.class) return arg instanceof Double;
  return type.isInstance(arg);
}
static String classNameToVM(String name) {
  return name.replace(".", "$");
}
static boolean booleanValue(Object o) {
  return eq(true, o);
}
static List emptyList() {
  return new ArrayList();
  //ret Collections.emptyList();
}
static void frameStandardSize(JFrame frame) {
  frame.setBounds(300, 100, 500, 400);
}
static ImageIcon imageIcon(String imageID) { try {
 
  return new ImageIcon(loadBinarySnippet(imageID).toURI().toURL());

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static ImageIcon imageIcon(BufferedImage img) {
  return new ImageIcon(img);
}
static boolean nempty(Collection c) {
  return !isEmpty(c);
}

static boolean nempty(CharSequence s) {
  return !isEmpty(s);
}

static boolean nempty(Object[] o) {
  return !isEmpty(o);
}

static boolean nempty(Map m) {
  return !isEmpty(m);
}

static boolean nempty(Iterator i) {
  return i != null && i.hasNext();
}
static Object getOpt(Object o, String field) {
  return getOpt_cached(o, field);
}

static Object getOpt_raw(Object o, String field) {
  try {
    Field f = getOpt_findField(o.getClass(), field);
    if (f == null) return null;
    f.setAccessible(true);
    return f.get(o);
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

static Object getOpt(Class c, String field) {
  try {
    if (c == null) return null;
    Field f = getOpt_findStaticField(c, field);
    if (f == null) return null;
    f.setAccessible(true);
    return f.get(null);
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

static Field getOpt_findStaticField(Class<?> c, String field) {
  Class _c = c;
  do {
    for (Field f : _c.getDeclaredFields())
      if (f.getName().equals(field) && (f.getModifiers() & Modifier.STATIC) != 0)
        return f;
    _c = _c.getSuperclass();
  } while (_c != null);
  return null;
}

static Field getOpt_findField(Class<?> c, String field) {
  Class _c = c;
  do {
    for (Field f : _c.getDeclaredFields())
      if (f.getName().equals(field))
        return f;
    _c = _c.getSuperclass();
  } while (_c != null);
  return null;
}
static long parseLong(String s) {
  if (s == null) return 0;
  return Long.parseLong(dropSuffix("L", s));
}

static long parseLong(Object s) {
  return Long.parseLong((String) s);
}
static File userDir() {
  return new File(userHome());
}

static File userDir(String path) {
  return new File(userHome(), path);
}
static boolean isAndroid() { return System.getProperty("java.vendor").toLowerCase().indexOf("android") >= 0; }


// runnable = Runnable or voidfunc(MouseEvent)
static void onTitleRightClick(final JFrame frame, final Object runnable) {
  swingLater(new Runnable() { public void run() { try { 
    if (!isSubstanceLAF())
      print("Can't add title right click!");
    else {
      JComponent titleBar = getTitlePaneComponent(frame);
      titleBar.addMouseListener(new MouseAdapter() {
        public void mousePressed(MouseEvent e) {
          if (e.isPopupTrigger())
            callF(runnable, e);
        }
      });
    }
  
} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); } } });
}
static boolean isSubstanceLAF() {
  return substanceLookAndFeelEnabled();
}
static JMenuItem jmenuItem(String text, final Runnable r) {
  JMenuItem mi = new JMenuItem(text);
  mi.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent _evt) { r.run(); }});
  return mi;
}
static void revalidate(Component c) {
  if (c == null || !c.isShowing()) return;
  // magic combo to actually relayout and repaint
  c.revalidate();
  c.repaint();
}
static File loadBinarySnippet(String snippetID) { try {
 
  long id = parseSnippetID(snippetID);
  File f = DiskSnippetCache_getLibrary(id);
  if (f == null) {
    byte[] data = loadDataSnippetImpl(snippetID);
    DiskSnippetCache_putLibrary(id, data);
    f = DiskSnippetCache_getLibrary(id);
  }
  return f;

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static void showConsole() {
  JFrame frame = consoleFrame();
  if (frame != null)
    frame.setVisible(true);
}
static final WeakHashMap<Class, HashMap<String, Field>> getOpt_cache = new WeakHashMap();
static final HashMap getOpt_special = new HashMap(); // just a marker

static {
  getOpt_cache.put(Class.class, getOpt_special);
  getOpt_cache.put(String.class, getOpt_special);
}

static Object getOpt_cached(Object o, String field) { try {
 
  if (o == null) return null;

  Class c = o.getClass();
  HashMap<String, Field> map;
  synchronized(getOpt_cache) {
    map = getOpt_cache.get(c);
    if (map == null)
      map = getOpt_makeCache(c);
  }
  
  if (map == getOpt_special) {
    if (o instanceof Class)
      return getOpt((Class) o, field);
    if (o instanceof String)
      return getOpt(getBot((String) o), field);
    if (o instanceof Map)
      return ((Map) o).get(field);
  }
    
  Field f = map.get(field);
  if (f != null) return f.get(o);
  if (o instanceof DynamicObject)
    return ((DynamicObject) o).fieldValues.get(field);
  return null;

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

// used internally - we are in synchronized block
static HashMap<String, Field> getOpt_makeCache(Class c) {
  HashMap<String, Field> map;
  if (isSubtypeOf(c, Map.class))
    map = getOpt_special;
  else {
    map = new HashMap();
    Class _c = c;
    do {
      for (Field f : _c.getDeclaredFields()) {
        f.setAccessible(true);
        String name = f.getName();
        if (!map.containsKey(name))
          map.put(name, f);
      }
      _c = _c.getSuperclass();
    } while (_c != null);
  }
  getOpt_cache.put(c, map);
  return map;
}
static void restart() {
  Object j = getJavaX();
  call(j, "cleanRestart", get(j, "fullArgs"));
}
static boolean isEmpty(Collection c) {
  return c == null || c.isEmpty();
}

static boolean isEmpty(CharSequence s) {
  return s == null || s.length() == 0;
}

static boolean isEmpty(Object[] a) {
  return a == null || a.length == 0;
}

static boolean isEmpty(Map map) {
  return map == null || map.isEmpty();
}
static String dropSuffix(String suffix, String s) {
  return s.endsWith(suffix) ? s.substring(0, l(s)-l(suffix)) : s;
}
static String programTitle() {
  return getProgramName();
}
// c = Component or something implementing swing()
static Component wrap(Object swingable) {
  Component c = (Component) ( swingable instanceof Component ? swingable : call(swingable, "swing"));
  if (c instanceof JTable || c instanceof JList
    || c instanceof JTextArea || c instanceof JEditorPane
    || c instanceof JTextPane)
    return new JScrollPane(c);
  return c;
}



static JFrame consoleFrame() {
  return (JFrame) getOpt(get(getJavaX(), "console"), "frame");
}
static Object getBot(String botID) {
  return callOpt(getMainBot(), "getBot", botID);
}

static boolean substanceLookAndFeelEnabled() {
  return startsWith(getLookAndFeel(), "org.pushingpixels.");
}
static boolean isSubtypeOf(Class a, Class b) {
  return b.isAssignableFrom(a); // << always hated that method, let's replace it!
}
static JComponent getTitlePaneComponent(Window window) {
  if (!substanceLookAndFeelEnabled()) return null;
  
	JRootPane rootPane = null;
	if (window instanceof JFrame) {
		JFrame f = (JFrame) window;
		rootPane = f.getRootPane();
	}
	if (window instanceof JDialog) {
		JDialog d = (JDialog) window;
		rootPane = d.getRootPane();
	}
	if (rootPane != null) {
		Object /*SubstanceRootPaneUI*/ ui = rootPane.getUI();
		return (JComponent) call(ui, "getTitlePane");
	}
	return null;
}

  
  // Data files are immutable, use centralized cache
public static File DiskSnippetCache_getLibrary(long snippetID) throws IOException {
  File file = new File(getGlobalCache(), "data_" + snippetID + ".jar");
  return file.exists() ? file : null;
}

public static void DiskSnippetCache_putLibrary(long snippetID, byte[] data) throws IOException {
  saveBinaryFile(new File(getGlobalCache(), "data_" + snippetID).getPath() + ".jar", data);
}

static byte[] loadDataSnippetImpl(String snippetID) throws IOException {
  byte[] data;
  try {
    URL url = new URL("http://eyeocr.sourceforge.net/filestore/filestore.php?cmd=serve&file=blob_"
      + parseSnippetID(snippetID) + "&contentType=application/binary");
    System.err.println("Loading library: " + url);
    try {
      data = loadBinaryPage(url.openConnection());
    } catch (RuntimeException e) {
      data = null;
    }
    
    if (data == null || data.length == 0) {
      url = new URL("http://data.tinybrain.de/blobs/"
        + parseSnippetID(snippetID));
      System.err.println("Loading library: " + url);
      data = loadBinaryPage(url.openConnection());
    }
    System.err.println("Bytes loaded: " + data.length);
  } catch (FileNotFoundException e) {
    throw new IOException("Binary snippet #" + snippetID + " not found or not public");
  }
  return data;
}
// get purpose 1: access a list/array (safer version of x.get(y))

static <A> A get(List<A> l, int idx) {
  return idx >= 0 && idx < l(l) ? l.get(idx) : null;
}

static <A> A get(A[] l, int idx) {
  return idx >= 0 && idx < l(l) ? l[idx] : null;
}

// default to false
static boolean get(boolean[] l, int idx) {
  return idx >= 0 && idx < l(l) ? l[idx] : false;
}

static Class get_dynamicObject = DynamicObject.class;

// get purpose 2: access a field by reflection or a map

static Object get(Object o, String field) {
  try {
    if (o instanceof Class) return get((Class) o, field);
    
    if (o instanceof Map)
      return ((Map) o).get(field);
      
    Field f = getOpt_findField(o.getClass(), field);
    if (f != null) {
      f.setAccessible(true);
      return f.get(o);
    }
      
    if (get_dynamicObject != null && get_dynamicObject.isInstance(o))
      return call(get_raw(o, "fieldValues"), "get", field);
  } catch (Exception e) {
    throw asRuntimeException(e);
  }
  throw new RuntimeException("Field '" + field + "' not found in " + o.getClass().getName());
}

static Object get_raw(Object o, String field) {
  try {
    Field f = get_findField(o.getClass(), field);
    f.setAccessible(true);
    return f.get(o);
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

static Object get(Class c, String field) {
  try {
    Field f = get_findStaticField(c, field);
    f.setAccessible(true);
    return f.get(null);
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

static Field get_findStaticField(Class<?> c, String field) {
  Class _c = c;
  do {
    for (Field f : _c.getDeclaredFields())
      if (f.getName().equals(field) && (f.getModifiers() & Modifier.STATIC) != 0)
        return f;
    _c = _c.getSuperclass();
  } while (_c != null);
  throw new RuntimeException("Static field '" + field + "' not found in " + c.getName());
}

static Field get_findField(Class<?> c, String field) {
  Class _c = c;
  do {
    for (Field f : _c.getDeclaredFields())
      if (f.getName().equals(field))
        return f;
    _c = _c.getSuperclass();
  } while (_c != null);
  throw new RuntimeException("Field '" + field + "' not found in " + c.getName());
}
static Class __javax;

static Class getJavaX() {
  return __javax;
}
static String getProgramName_cache;

static synchronized String getProgramName() {
  if (getProgramName_cache == null)
    getProgramName_cache = getSnippetTitle(getProgramID());
  return getProgramName_cache;
}


static Object mainBot;

static Object getMainBot() {
  return mainBot;
}
static File getGlobalCache() {
  File file = new File(userHome(), ".tinybrain/snippet-cache");
  file.mkdirs();
  return file;
}

static String getSnippetTitle(String id) { try {
 
  if (!isSnippetID(id)) return "?";
  return trim(loadPageSilently(new URL("http://tinybrain.de:8080/tb-int/getfield.php?id=" + parseSnippetID(id) + "&field=title" + standardCredentials())));

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static String getLookAndFeel() {
  return getClassName(UIManager.getLookAndFeel());
}
static RuntimeException asRuntimeException(Throwable t) {
  return t instanceof RuntimeException ? (RuntimeException) t : new RuntimeException(t);
}
  /** writes safely (to temp file, then rename) */
  public static void saveBinaryFile(String fileName, byte[] contents) throws IOException {
    File file = new File(fileName);
    File parentFile = file.getParentFile();
    if (parentFile != null)
      parentFile.mkdirs();
    String tempFileName = fileName + "_temp";
    FileOutputStream fileOutputStream = newFileOutputStream(tempFileName);
    fileOutputStream.write(contents);
    fileOutputStream.close();
    if (file.exists() && !file.delete())
      throw new IOException("Can't delete " + fileName);

    if (!new File(tempFileName).renameTo(file))
      throw new IOException("Can't rename " + tempFileName + " to " + fileName);
  }

  static void saveBinaryFile(File fileName, byte[] contents) {
    try {
      saveBinaryFile(fileName.getPath(), contents);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
static byte[] loadBinaryPage(String url) { try {
 
  return loadBinaryPage(new URL(url).openConnection());

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

public static byte[] loadBinaryPage(URLConnection con) { try {
 
  //setHeaders(con);
  ByteArrayOutputStream buf = new ByteArrayOutputStream();
  InputStream inputStream = con.getInputStream();
  int n = 0;
  while (true) {
    int ch = inputStream.read();
    if (ch < 0)
      break;
    buf.write(ch);
    if (++n % 100000 == 0)
      System.err.println("  " + n + " bytes loaded.");
  }
  inputStream.close();
  return buf.toByteArray();

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}

static boolean startsWith(String a, String b) {
  return a != null && a.startsWith(b);
}

static boolean startsWith(List a, List b) {
  if (a == null || l(b) > l(a)) return false;
  for (int i = 0; i < l(b); i++)
    if (neq(a.get(i), b.get(i)))
      return false;
  return true;
}


static String trim(String s) { return s == null ? null : s.trim(); }
static String trim(StringBuilder buf) { return buf.toString().trim(); }
static String trim(StringBuffer buf) { return buf.toString().trim(); }
static String standardCredentials() {
  String user = standardCredentialsUser();
  String pass = trim(loadTextFile(new File(userHome(), ".tinybrain/userpass")));
  if (nempty(user) && nempty(pass))
    return "&_user=" + urlencode(user) + "&_pass=" + urlencode(pass);
  return "";
}
  static ThreadLocal<String> loadPage_charset = new ThreadLocal<String>();
  static boolean loadPage_allowGzip = true, loadPage_debug;
  static boolean loadPage_anonymous; // don't send computer ID
  static int loadPage_verboseness = 100000;
  static int loadPage_retries = 60; // seconds

  public static String loadPageSilently(String url) {
    try {
      return loadPageSilently(new URL(loadPage_preprocess(url)));
    } catch (IOException e) { throw new RuntimeException(e); }
  }

  public static String loadPageSilently(URL url) {
    try {
      IOException e = null;
      for (int tries = 0; tries < loadPage_retries; tries++)
        try {
          URLConnection con = openConnection(url);
          return loadPage(con, url);
        } catch (IOException _e) {
          e = _e;
          if (loadPageThroughProxy_enabled) {
            print("Trying proxy because of: " + e);
            try {
              return loadPageThroughProxy(str(url));
            } catch (Throwable e2) {
              print("  " + exceptionToStringShort(e2));
            }
          }
          sleepSeconds(1);
        }
      throw e;
    } catch (IOException e) { throw new RuntimeException(e); }
  }

  static String loadPage_preprocess(String url) {  
    if (url.startsWith("tb/"))
      url = "tinybrain.de:8080/" + url;
    if (url.indexOf("://") < 0)
      url = "http://" + url;
    return url;
  }
  
  public static String loadPage(String url) {
    try {
      url = loadPage_preprocess(url);
      print("Loading: " + hideCredentials(url));
      return loadPageSilently(new URL(url));
    } catch (IOException e) { throw new RuntimeException(e); }
  }
  
  public static String loadPage(URL url) {
    print("Loading: " + hideCredentials(url.toExternalForm()));
    return loadPageSilently(url);
  }

  public static String loadPage(URLConnection con, URL url) throws IOException {
    try {
      if (!loadPage_anonymous) {
        String computerID = getComputerID();
        if (computerID != null)
          con.setRequestProperty("X-ComputerID", computerID);
      }
      if (loadPage_allowGzip)
        con.setRequestProperty("Accept-Encoding", "gzip");
    } catch (Throwable e) {} // fails if within doPost
    String contentType = con.getContentType();
    if (contentType == null)
      throw new IOException("Page could not be read: " + url);
    //print("Content-Type: " + contentType);
    String charset = loadPage_charset == null ? null : loadPage_charset.get();
    if (charset == null) charset = loadPage_guessCharset(contentType);
    
    InputStream in = con.getInputStream();
    if ("gzip".equals(con.getContentEncoding())) {
      if (loadPage_debug)
        print("loadPage: Using gzip.");
      in = new GZIPInputStream(in);
    }
    Reader r = new InputStreamReader(in, charset);
    
    StringBuilder buf = new StringBuilder();
    int n = 0;
    while (true) {
      int ch = r.read();
      if (ch < 0)
        break;
      buf.append((char) ch);
      ++n;
      if ((n % loadPage_verboseness) == 0) print("  " + n + " chars read");
    }
    return buf.toString();
  }
  
  static String loadPage_guessCharset(String contentType) {
    Pattern p = Pattern.compile("text/[a-z]+;\\s+charset=([^\\s]+)\\s*");
    Matcher m = p.matcher(contentType);
    String match = m.matches() ? m.group(1) : null;
    if (loadPage_debug)
      print("loadPage: contentType=" + contentType + ", match: " + match);
    /* If Content-Type doesn't match this pre-conception, choose default and hope for the best. */
    return or(match, "ISO-8859-1");
  }

static boolean neq(Object a, Object b) {
  return !eq(a, b);
}
static String getClassName(Object o) {
  return o == null ? "null" : o.getClass().getName();
}
static FileOutputStream newFileOutputStream(File path) throws IOException {
  return newFileOutputStream(path.getPath());
}

static FileOutputStream newFileOutputStream(String path) throws IOException {
  return newFileOutputStream(path, false);
}

static FileOutputStream newFileOutputStream(String path, boolean append) throws IOException {
  FileOutputStream f = new // Line break for ancient translator
    FileOutputStream(path, append);
  callJavaX("registerIO", f, path, true);
  return f;
}


static String urlencode(String x) {
  try {
    return URLEncoder.encode(unnull(x), "UTF-8");
  } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); }
}
static String standardCredentialsUser() {
  return trim(loadTextFile(new File(userHome(), ".tinybrain/username")));
}
static String str(Object o) {
  return String.valueOf(o);
}
static String getComputerID() { try {
 
  return computerID();

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static String hideCredentials(String url) {
  return url.replaceAll("&_pass=[^&]*", "&_pass=<hidden>");
}
static String exceptionToStringShort(Throwable e) {
  e = getInnerException(e);
  String msg = unnull(e.getMessage());
  if (msg.indexOf("Error") < 0 && msg.indexOf("Exception") < 0)
    return baseClassName(e) + ": " + msg;
  else
    return msg;
}
static final boolean loadPageThroughProxy_enabled = false;

static String loadPageThroughProxy(String url) {
  return null;
}
static URLConnection openConnection(URL url) { try {
 
  ping();
  return url.openConnection();

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static void sleepSeconds(double s) {
  if (s > 0) sleep(round(s*1000));
}
static Object callJavaX(String method, Object... args) {
  return callOpt(getJavaX(), method, args);
}
  public static String loadTextFile(String fileName) {
    try {
      return loadTextFile(fileName, null);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String loadTextFile(String fileName, String defaultContents) throws IOException {
    if (!new File(fileName).exists())
      return defaultContents;

    FileInputStream fileInputStream = new FileInputStream(fileName);
    InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "UTF-8");
    return loadTextFile(inputStreamReader);
  }
  
  public static String loadTextFile(File fileName) {
    try {
      return loadTextFile(fileName, null);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  public static String loadTextFile(File fileName, String defaultContents) throws IOException {
    try {
      return loadTextFile(fileName.getPath(), defaultContents);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
  
  public static String loadTextFile(Reader reader) throws IOException {
    StringBuilder builder = new StringBuilder();
    try {
      char[] buffer = new char[1024];
      int n;
      while (-1 != (n = reader.read(buffer)))
        builder.append(buffer, 0, n);
        
    } finally {
      reader.close();
    }
    return builder.toString();
  }
static <A> A or(A a, A b) {
  return a != null ? a : b;
}


static void sleep(long ms) {
  ping();
  try {
    Thread.sleep(ms);
  } catch (Exception e) { throw new RuntimeException(e); }
}

static void sleep() { try {
 
  print("Sleeping.");
  synchronized(main.class) { main.class.wait(); }

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static String baseClassName(String className) {
  return substring(className, className.lastIndexOf('.'));
}

static String baseClassName(Object o) {
  return baseClassName(getClassName(o));
}
static Throwable getInnerException(Throwable e) {
  while (e.getCause() != null)
    e = e.getCause();
  return e;
}
static String _computerID;
public static String computerID() { try {
 
  if (_computerID == null) {
    File file = new File(userHome(), ".tinybrain/computer-id");
    _computerID = loadTextFile(file.getPath(), null);
    if (_computerID == null) {
      _computerID = makeRandomID(12);
      saveTextFile(file.getPath(), _computerID);
    }
  }
  return _computerID;

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static long round(double d) {
  return Math.round(d);
}


  /** writes safely (to temp file, then rename) */
  public static void saveTextFile(String fileName, String contents) throws IOException {
    File file = new File(fileName);
    File parentFile = file.getParentFile();
    if (parentFile != null)
      parentFile.mkdirs();
    String tempFileName = fileName + "_temp";
    File tempFile = new File(tempFileName);
    if (contents != null) {
      if (tempFile.exists()) try {
        String saveName = tempFileName + ".saved." + now();
        copyFile(tempFile, new File(saveName));
      } catch (Throwable e) { printStackTrace(e); }
      FileOutputStream fileOutputStream = newFileOutputStream(tempFile.getPath());
      OutputStreamWriter outputStreamWriter = new OutputStreamWriter(fileOutputStream, "UTF-8");
      PrintWriter printWriter = new PrintWriter(outputStreamWriter);
      printWriter.print(contents);
      printWriter.close();
    }
    
    if (file.exists() && !file.delete())
      throw new IOException("Can't delete " + fileName);

    if (contents != null)
      if (!tempFile.renameTo(file))
        throw new IOException("Can't rename " + tempFile + " to " + file);
  }
  
  public static void saveTextFile(File fileName, String contents) {
    try {
      saveTextFile(fileName.getPath(), contents);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

static String substring(String s, int x) {
  return safeSubstring(s, x);
}

static String substring(String s, int x, int y) {
  return safeSubstring(s, x, y);
}
static String makeRandomID(int length) {
  Random random = new Random();
  char[] id = new char[length];
  for (int i = 0; i < id.length; i++)
    id[i] = (char) ((int) 'a' + random.nextInt(26));
  return new String(id);
}


// hopefully covers all cases :)
static String safeSubstring(String s, int x, int y) {
  if (s == null) return null;
  if (x < 0) x = 0;
  if (x > s.length()) return "";
  if (y < x) y = x;
  if (y > s.length()) y = s.length();
  return s.substring(x, y);
}

static String safeSubstring(String s, int x) {
  return safeSubstring(s, x, l(s));
}

static void printStackTrace(Throwable e) {
  // we go to system.out now - system.err is nonsense
  print(getStackTrace(e));
}

static void printStackTrace() {
  printStackTrace(new Throwable());
}

static void printStackTrace(String indent, Throwable e) {
  if (endsWithLetter(indent)) indent += " ";
  printIndent(indent, getStackTrace(e));
}
public static void copyFile(File src, File dest) { try {
 
  mkdirsForFile(dest);
  FileInputStream inputStream = new FileInputStream(src.getPath());
  FileOutputStream outputStream = newFileOutputStream(dest.getPath());
  try {
    copyStream(inputStream, outputStream);
    inputStream.close();
  } finally {
    outputStream.close();
  }

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
static long now_virtualTime;
static long now() {
  return now_virtualTime != 0 ? now_virtualTime : System.currentTimeMillis();
}



static void printIndent(Object o) {
  print(indentx(str(o)));
}

static void printIndent(String indent, Object o) {
  print(indentx(indent, str(o)));
}

static void printIndent(int indent, Object o) {
  print(indentx(indent, str(o)));
}
static boolean endsWithLetter(String s) {
  return nempty(s) && isLetter(last(s));
}
static String getStackTrace(Throwable throwable) {
  StringWriter writer = new StringWriter();
  throwable.printStackTrace(new PrintWriter(writer));
  return writer.toString();
}
public static File mkdirsForFile(File file) {
  File dir = file.getParentFile();
  if (dir != null) // is null if file is in current dir
    dir.mkdirs();
  return file;
}

static void copyStream(InputStream in, OutputStream out) { try {
 
  byte[] buf = new byte[65536];
  while (true) {
    int n = in.read(buf);
    if (n <= 0) return;
    out.write(buf, 0, n);
  }

} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}


static String indentx(String s) {
  return indentx(indent_default, s);
}

static String indentx(int n, String s) {
  return dropSuffix(repeat(' ', n), indent(n, s));
}

static String indentx(String indent, String s) {
  return dropSuffix(indent, indent(indent, s));
}
static <A> A last(List<A> l) {
  return l.isEmpty() ? null : l.get(l.size()-1);
}

static char last(String s) {
  return empty(s) ? '#' : s.charAt(l(s)-1);
}
static boolean isLetter(char c) {
  return Character.isLetter(c);
}


static boolean empty(Collection c) {
  return isEmpty(c);
}

static boolean empty(String s) {
  return isEmpty(s);
}

static boolean empty(Map map) {
  return map == null || map.isEmpty();
}

static boolean empty(Object[] o) {
  return o == null || o.length == 0;
}

static boolean empty(Object o) {
  if (o instanceof Collection) return empty((Collection) o);
  if (o instanceof String) return empty((String) o);
  if (o instanceof Map) return empty((Map) o);
  if (o instanceof Object[]) return empty((Object[]) o);
  throw fail("unknown type for 'empty': " + getType(o));
}
static int indent_default = 2;

static String indent(int indent) {
  return repeat(' ', indent);
}

static String indent(int indent, String s) {
  return indent(repeat(' ', indent), s);
}

static String indent(String indent, String s) {
  return indent + s.replace("\n", "\n" + indent);
}

static String indent(String s) {
  return indent(indent_default, s);
}

static List<String> indent(String indent, List<String> lines) {
  List<String> l = new ArrayList<String>();
  for (String s : lines)
    l.add(indent + s);
  return l;
}
  static String repeat(char c, int n) {
    n = max(n, 0);
    char[] chars = new char[n];
    for (int i = 0; i < n; i++)
      chars[i] = c;
    return new String(chars);
  }

  static <A> List<A> repeat(A a, int n) {
    List<A> l = new ArrayList<A>();
    for (int i = 0; i < n; i++)
      l.add(a);
    return l;
  }



static String getType(Object o) {
  return getClassName(o);
}


static class ImageSurface extends Surface {
  private BufferedImage image;
  private double zoomX = 1, zoomY = 1;
  private Rectangle selection;
  List tools = new ArrayList();
  Object overlay; // voidfunc(Graphics2D)
  Runnable onSelectionChange;

  public ImageSurface() {
    this(new RGBImage(1, 1, new int[] { 0xFFFFFF }));
  }

  public ImageSurface(RGBImage image) {
    this(image.getBufferedImage());
  }

  public ImageSurface(BufferedImage image) {
    clearSurface = false;
    this.image = image;
    
    new PopupMenuHelper() {
      @Override
      public void fillMenu() {
        Point p = new Point((int) (point.x/getZoomX()), (int) (point.y/getZoomY()));
        fillPopupMenu(menu, p);
      }
    }.install(this);
    
    new ImageSurfaceSelector(this);
  }

  public ImageSurface(RGBImage image, double zoom) {
    this(image);
    setZoom(zoom);
  }

  // point is already in image coordinates
  protected void fillPopupMenu(JPopupMenu menu, final Point point) {
    JMenuItem miZoomReset = new JMenuItem("Zoom 100%");
    miZoomReset.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        setZoom(1.0);
        centerPoint(point);
      }
    });
    menu.add(miZoomReset);

    JMenuItem miZoomIn = new JMenuItem("Zoom in");
    miZoomIn.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        setZoom(getZoomX()*2.0, getZoomY()*2.0);
        centerPoint(point);
      }
    });
    menu.add(miZoomIn);

    JMenuItem miZoomOut = new JMenuItem("Zoom out");
    miZoomOut.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        setZoom(getZoomX()*0.5, getZoomY()*0.5);
        centerPoint(point);
      }
    });
    menu.add(miZoomOut);

    JMenuItem miZoomToWindow = new JMenuItem("Zoom to window");
    miZoomToWindow.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        zoomToDisplaySize();
      }
    });
    menu.add(miZoomToWindow);

    menu.addSeparator();

    /*JMenuItem miSelect = new JMenuItem("Select rectangle");
    miSelect.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent actionEvent) {
        setTool(new ImageSurfaceSelector(ImageSurface.this));
      }
    });
    menu.add(miSelect);

    menu.add(magicWandMenuItem(2));
    menu.add(magicWandMenuItem(4));
    menu.add(magicWandMenuItem(8));

    menu.addSeparator();*/

    JMenuItem miSave = new JMenuItem("Save image...");
    miSave.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        saveImage();
      }
    });
    menu.add(miSave);

    /*JMenuItem miUpload = new JMenuItem("Upload image...");
    miUpload.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent evt) {
        uploadImage();
      }
    });
    menu.add(miUpload);*/
  }

  public void saveImage() {
    RGBImage image = new RGBImage(getImage(), null);
    JFileChooser fileChooser = new JFileChooser(getProgramDir());
    if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
      try {
        image.save(fileChooser.getSelectedFile());
      } catch (IOException e) {
        popup(e);
      }
    }
  }

  public void render(int w, int h, Graphics2D g) {
    g.setColor(Color.white);
    g.fillRect(0, 0, w, h);
    if (image != null)
      g.drawImage(image, 0, 0, getZoomedWidth(), getZoomedHeight(), null);

    if (overlay != null) pcallF(overlay, g);

    if (selection != null) {
      // drawRect is inclusive, selection is exclusive, so... whatever, tests show it's cool.
      drawSelectionRect(g, selection, Color.green, Color.white);
    }
  }

  public void drawSelectionRect(Graphics2D g, Rectangle selection, Color green, Color white) {
    g.setColor(green);
    int top = (int) (selection.y * zoomY);
    int bottom = (int) ((selection.y+selection.height) * zoomY);
    int left = (int) (selection.x * zoomX);
    int right = (int) ((selection.x+selection.width) * zoomX);
    g.drawRect(left-1, top-1, right-left+1, bottom-top+1);
    g.setColor(white);
    g.drawRect(left - 2, top - 2, right - left + 3, bottom - top + 3);
  }

  public void setZoom(double zoom) {
    setZoom(zoom, zoom);
  }

  public void setZoom(double zoomX, double zoomY) {
    this.zoomX = zoomX;
    this.zoomY = zoomY;
    revalidate();
    repaint();
  }

  public Dimension getMinimumSize() {
    int w = getZoomedWidth();
    int h = getZoomedHeight();
    Dimension min = super.getMinimumSize();
    return new Dimension(Math.max(w, min.width), Math.max(h, min.height));
  }

  private int getZoomedHeight() {
    return (int) (image.getHeight() * zoomY);
  }

  private int getZoomedWidth() {
    return (int) (image.getWidth() * zoomX);
  }

  public void setImage(RGBImage image) {
    setImage(image.getBufferedImage());
  }

  public void setImage(BufferedImage image) {
    this.image = image;
    revalidate();
    repaint();
  }

  public BufferedImage getImage() {
    return image;
  }

  public double getZoomX() {
    return zoomX;
  }

  public double getZoomY() {
    return zoomY;
  }

  public Dimension getPreferredSize() {
    return new Dimension(getZoomedWidth(), getZoomedHeight());
  }

  /** returns a scrollpane with the scroll-mode prevent-garbage-drawing fix applied */
  public JScrollPane makeScrollPane() {
    JScrollPane scrollPane = new JScrollPane(this);
    scrollPane.getViewport().setScrollMode(JViewport.BACKINGSTORE_SCROLL_MODE);
    return scrollPane;
  }

  public void zoomToDisplaySize() {
    if (image == null) return;
    Dimension display = getDisplaySize();
    double xRatio = display.width/(double) image.getWidth();
    double yRatio = display.height/(double) image.getHeight();
    setZoom(Math.min(xRatio, yRatio));
    revalidate();
  }

  /** tricky magic to get parent scroll pane */
  private Dimension getDisplaySize() {
    Container c = getParent();
    while (c != null) {
      if (c instanceof JScrollPane)
        return c.getSize();
      c = c.getParent();
    }
    return getSize();
  }

  public void setSelection(Rectangle r) {
    if (neq(selection, r)) {
      selection = r;
      pcallF(onSelectionChange);
      repaint();
    }
  }

  public Rectangle getSelection() {
    return selection;
  }

  public RGBImage getRGBImage() {
    return new RGBImage(getImage());
  }
  
  // p is in image coordinates
  void centerPoint(Point p) {
    //_print("centerPoint " + p);
    if (!(getParent() instanceof JViewport))
      return;
      
    p = new Point((int) (p.x*getZoomX()), (int) (p.y*getZoomY()));
    final JViewport viewport = (JViewport) ( getParent());
    Dimension viewSize = viewport.getExtentSize();
    
    //_print("centerPoint " + p);
    int x = max(0, p.x-viewSize.width/2);
    int y = max(0, p.y-viewSize.height/2);
    
    p = new Point(x,y);
    //_print("centerPoint " + p);
    final Point _p = p;
    awtLater(new Runnable() { public void run() { try { 
      viewport.setViewPosition(_p);
    
} catch (Exception __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); } } });
  }
}

abstract static class Surface extends JPanel {


  public Object AntiAlias = RenderingHints.VALUE_ANTIALIAS_ON;
  public Object Rendering = RenderingHints.VALUE_RENDER_SPEED;
  public AlphaComposite composite;
  public Paint texture;
  public BufferedImage bimg;
  public int imageType;
  public String name;
  public boolean clearSurface = true;
  // Demos using animated gif's that implement ImageObserver set dontThread.
  public boolean dontThread;

  protected long sleepAmount = 50; // max20 fps

  private long orig, start, frame;
  private Toolkit toolkit;
  private boolean perfMonitor, outputPerf;
  private int biw, bih;
  private boolean clearOnce;
  private boolean toBeInitialized = true;


  public Surface() {
    setDoubleBuffered(false);
    toolkit = getToolkit();
    name = this.getClass().getName();
    name = name.substring(name.indexOf(".", 7)+1);
    setImageType(0);

    // To launch an individual demo with the performance str output  :
    //    java -Djava2demo.perf= -cp Java2Demo.jar demos.Clipping.ClipAnim
    try {
      if (System.getProperty("java2demo.perf") != null) {
        perfMonitor = outputPerf = true;
      }
    } catch (Exception ex) { }
  }


    /*protected Image getImage(String name) {
        return DemoImages.getImage(name, this);
    }


    protected Font getFont(String name) {
        return DemoFonts.getFont(name);
    }*/


  public int getImageType() {
    return imageType;
  }


  public void setImageType(int imgType) {
    if (imgType == 0) {
      imageType = 1;
    } else {
      imageType = imgType;
    }
    bimg = null;
  }


  public void setAntiAlias(boolean aa) {
    AntiAlias = aa
      ? RenderingHints.VALUE_ANTIALIAS_ON
      : RenderingHints.VALUE_ANTIALIAS_OFF;
  }


  public void setRendering(boolean rd) {
    Rendering = rd
      ? RenderingHints.VALUE_RENDER_QUALITY
      : RenderingHints.VALUE_RENDER_SPEED;
  }


  public void setTexture(Object obj) {
    if (obj instanceof GradientPaint) {
      texture = new GradientPaint(0, 0, Color.white,
        getSize().width*2, 0, Color.green);
    } else {
      texture = (Paint) obj;
    }
  }


  public void setComposite(boolean cp) {
    composite = cp
      ? AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f)
      : null;
  }


  public void setMonitor(boolean pm) {
    perfMonitor = pm;
  }


  public void setSleepAmount(long amount) {
    sleepAmount = amount;
  }


  public long getSleepAmount() {
    return sleepAmount;
  }


  public BufferedImage createBufferedImage(Graphics2D g2,
                                           int w,
                                           int h,
                                           int imgType) {
    BufferedImage bi = null;
    if (imgType == 0) {
      bi = (BufferedImage) g2.getDeviceConfiguration().
        createCompatibleImage(w, h);
    } else if (imgType > 0 && imgType < 14) {
      bi = new BufferedImage(w, h, imgType);
    } else if (imgType == 14) {
      bi = createBinaryImage(w, h, 2);
    } else if (imgType == 15) {
      bi = createBinaryImage(w, h, 4);
    } else if (imgType == 16) {
      bi = createSGISurface(w, h, 32);
    } else if (imgType == 17) {
      bi = createSGISurface(w, h, 16);
    }
    biw = w;
    bih = h;
    return bi;
  }


  // Lookup tables for BYTE_BINARY 1, 2 and 4 bits.
  static byte[] lut1Arr = new byte[] {0, (byte)255 };
  static byte[] lut2Arr = new byte[] {0, (byte)85, (byte)170, (byte)255};
  static byte[] lut4Arr = new byte[] {0, (byte)17, (byte)34, (byte)51,
    (byte)68, (byte)85,(byte) 102, (byte)119,
    (byte)136, (byte)153, (byte)170, (byte)187,
    (byte)204, (byte)221, (byte)238, (byte)255};


  private BufferedImage createBinaryImage(int w, int h, int pixelBits) {
    int bytesPerRow = w * pixelBits / 8;
    if (w * pixelBits % 8 != 0) {
      bytesPerRow++;
    }
    byte[] imageData = new byte[h * bytesPerRow];
    IndexColorModel cm = null;
    switch (pixelBits) {
      case 1:
        cm = new IndexColorModel(pixelBits, lut1Arr.length,
          lut1Arr, lut1Arr, lut1Arr);
        break;
      case 2:
        cm = new IndexColorModel(pixelBits, lut2Arr.length,
          lut2Arr, lut2Arr, lut2Arr);
        break;
      case 4:
        cm = new IndexColorModel(pixelBits, lut4Arr.length,
          lut4Arr, lut4Arr, lut4Arr);
        break;
      default:
      {new Exception("Invalid # of bit per pixel").printStackTrace();}
    }

    DataBuffer db = new DataBufferByte(imageData, imageData.length);
    WritableRaster r = Raster.createPackedRaster(db, w, h, pixelBits, null);
    return new BufferedImage(cm, r, false, null);
  }

  private BufferedImage createSGISurface(int w, int h, int pixelBits) {
    int rMask32 = 0xFF000000;
    int rMask16 = 0xF800;
    int gMask32 = 0x00FF0000;
    int gMask16 = 0x07C0;
    int bMask32 = 0x0000FF00;
    int bMask16 = 0x003E;

    DirectColorModel dcm = null;
    DataBuffer db = null;
    WritableRaster wr = null;
    switch (pixelBits) {
      case 16:
        short[] imageDataUShort = new short[w * h];
        dcm = new DirectColorModel(16, rMask16, gMask16, bMask16);
        db = new DataBufferUShort(imageDataUShort, imageDataUShort.length);
        wr = Raster.createPackedRaster(db, w, h, w,
          new int[] {rMask16, gMask16, bMask16},
          null);
        break;
      case 32:
        int[] imageDataInt = new int[w * h];
        dcm = new DirectColorModel(32, rMask32, gMask32, bMask32);
        db = new DataBufferInt(imageDataInt, imageDataInt.length);
        wr = Raster.createPackedRaster(db, w, h, w,
          new int[] {rMask32, gMask32, bMask32},
          null);
        break;
      default:
      {new Exception("Invalid # of bit per pixel").printStackTrace();}
    }

    return new BufferedImage(dcm, wr, false, null);
  }

  public Graphics2D createGraphics2D(int width,
                                     int height,
                                     BufferedImage bi,
                                     Graphics g) {

    Graphics2D g2 = null;

    if (bi != null) {
      g2 = bi.createGraphics();
    } else {
      g2 = (Graphics2D) g;
    }

    g2.setBackground(getBackground());
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);
    g2.setRenderingHint(RenderingHints.KEY_RENDERING, Rendering);

    if (clearSurface || clearOnce) {
      g2.clearRect(0, 0, width, height);
      clearOnce = false;
    }

    if (texture != null) {
      // set composite to opaque for texture fills
      g2.setComposite(AlphaComposite.SrcOver);
      g2.setPaint(texture);
      g2.fillRect(0, 0, width, height);
    }

    if (composite != null) {
      g2.setComposite(composite);
    }

    return g2;
  }

  public abstract void render(int w, int h, Graphics2D g);


  /**
   * It's possible to turn off double-buffering for just the repaint
   * calls invoked directly on the non double buffered component.
   * This can be done by overriding paintImmediately() (which is called
   * as a result of repaint) and getting the current RepaintManager and
   * turning off double buffering in the RepaintManager before calling
   * super.paintImmediately(g).
   */
  public void paintImmediately(int x,int y,int w, int h) {
    RepaintManager repaintManager = null;
    boolean save = true;
    if (!isDoubleBuffered()) {
      repaintManager = RepaintManager.currentManager(this);
      save = repaintManager.isDoubleBufferingEnabled();
      repaintManager.setDoubleBufferingEnabled(false);
    }
    super.paintImmediately(x, y, w, h);

    if (repaintManager != null) {
      repaintManager.setDoubleBufferingEnabled(save);
    }
  }


  public void paint(Graphics g) {

    Dimension d = getSize();

    if (imageType == 1)
      bimg = null;
    else if (bimg == null || biw != d.width || bih != d.height) {
      bimg = createBufferedImage((Graphics2D)g,
        d.width, d.height, imageType-2);
      clearOnce = true;
      toBeInitialized = true;
    }

    if (toBeInitialized) {
      toBeInitialized = false;
      startClock();
    }

    Graphics2D g2 = createGraphics2D(d.width, d.height, bimg, g);
    render(d.width, d.height, g2);
    g2.dispose();

    if (bimg != null)  {
      g.drawImage(bimg, 0, 0, null);
      toolkit.sync();
    }

  }


  public void startClock() {
    orig = System.currentTimeMillis();
    start = orig;
    frame = 0;
  }

  private static final int REPORTFRAMES = 30;


  public static void setAlpha(Graphics2D g, float alpha) {
    g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha));
  }
}


static boolean DynamicObject_loading;

static class DynamicObject {
  String className; // just the name, without the "main$"
  Map<String, Object> fieldValues = new TreeMap<String, Object>();
  
  DynamicObject() {}
  // className = just the name, without the "main$"
  DynamicObject(String className) {
  this.className = className;}
}

static class BWImage {
  private int width, height;
  private BWImageSimpleStorage storage;

  // color returned when getPixel is called with a position outside the actual image
  private float borderColor = 0.0f;
  
  // for unstructure()
  BWImage() {}

  // BLACK! [Inefficient...]
  public BWImage(int width, int height) {
    this.width = width;
    this.height = height;
    byte[] bytePixels = new byte[width*height];
    storage = makeStorage(width, height, bytePixels);
  }

  public BWImage(int width, int height, float[] pixels) {
    this.width = width;
    this.height = height;
    byte[] bytePixels = new byte[pixels.length];
    for (int i = 0; i < pixels.length; i++)
      bytePixels[i] = toByte(pixels[i]);
    storage = makeStorage(width, height, bytePixels);
  }

  private BWImageSimpleStorage makeStorage(int width, int height, byte[] bytePixels) {
    return new BWImageSimpleStorage(width, height, bytePixels);
  }

  public BWImage(int width, int height, byte[] pixels) {
    this.height = height;
    this.width = width;
    storage = makeStorage(width, height, pixels);
  }

  public BWImage(BWImage image) {
    width = image.getWidth();
    height = image.getHeight();
    byte[] bytePixels = new byte[width*height];
    for (int y = 0; y < height; y++)
      for (int x = 0; x < width; x++)
        bytePixels[y*width+x] = image.getByte(x, y);
    storage = makeStorage(width, height, bytePixels);
  }

  public BWImage(RGBImage image) {
    width = image.getWidth();
    height = image.getHeight();
    byte[] result = new byte[height*width];
    for (int y = 0; y < height; y++)
      for (int x = 0; x < width; x++) {
        RGB rgb = image.getRGB(x, y);
        result[y*width+x] = BWImage.toByte(rgb.getBrightness());
      }
    storage = makeStorage(width, height, result);
  }

  /*public BWImage(BufferedImage image) {
    this(new RGBImage(image));
  }*/

  BWImage(BufferedImage image) { try {
 
 width = image.getWidth();
    height = image.getHeight();
    int[] pixels = new int[width*height];
    byte[] bytePixels = new byte[width*height];
    PixelGrabber pixelGrabber = new PixelGrabber(image, 0, 0, width, height, pixels, 0, width);
    if (!pixelGrabber.grabPixels())
      throw fail("Could not grab pixels");
    int n = width*height;
    
    for (int i = 0; i < n; i++) {
      //bytePixels[i] = pixelToByte(pixels[i]);
      int packed = pixels[i];
      float r = ((packed >> 16) & 0xFF)/255f;
      float g = ((packed >> 8) & 0xFF)/255f;
      float b = (packed & 0xFF)/255f;
      bytePixels[i] = (byte) ((r+g+b)/3.0f*255f);
    }
    storage = makeStorage(width, height, bytePixels);
  
} catch (Throwable __e) { throw __e instanceof RuntimeException ? (RuntimeException) __e : new RuntimeException(__e); }}
  
  // TODO: does it exactly match the other method? (asRGB+getBrightness+toByte)
  static byte pixelToByte(int packed) {
    /*int r = (packed >> 16) & 0xFF;
    int g = (packed >> 8) & 0xFF;
    int b = packed & 0xFF;
    ret (byte) ((r+g+b)/3.0f);*/
    float r = ((packed >> 16) & 0xFF)/255f;
    float g = ((packed >> 8) & 0xFF)/255f;
    float b = (packed & 0xFF)/255f;
    return (byte) ((r+g+b)/3.0f*255f);
  }

  public byte getByte(int x, int y) {
    return inRange(x, y) ? storage.getByte(x,y ) : toByte(borderColor);
  }

  public BWImage(int width, int height, float brightness) {
    this.width = width;
    this.height = height;
    byte[] pixels = new byte[width*height];
    for (int i = 0; i < pixels.length; i++)
      pixels[i] = toByte(brightness);
    storage = makeStorage(width, height, pixels);
  }

  public double averageBrightness() {
    double sum = 0;
    for (int y = 0; y < height; y++)
      for (int x = 0; x < width; x++)
        sum += getPixel(x, y);
    return (sum/(double) (height*width));
  }

  public float minimumBrightness() {
    float min = 1;
    for (int y = 0; y < height; y++)
      for (int x = 0; x < width; x++)
        min = Math.min(min, getPixel(x, y));
    return min;
  }

  public float getPixel(int x, int y) {
    return inRange(x, y) ? toFloat(storage.getByte(x,y )) : borderColor;
  }

  public static byte toByte(float pixel) {
    return (byte) (pixel*255f);
  }

  public static float toFloat(byte pixel) {
    return (((int) pixel) & 255)/255f;
  }

  private boolean inRange(int x, int y) {
    return x >= 0 && x < width && y >= 0 && y < height;
  }

  public int getWidth() {
    return width;
  }

  public int getHeight() {
    return height;
  }

  public RGBImage toRGB() {
    RGB[] rgbs = new RGB[width*height];
    for (int y = 0; y < height; y++)
      for (int x = 0; x < width; x++) {
        float p = getPixel(x, y);
        rgbs[y*width+x] = new RGB(p, p, p);
      }
    return new RGBImage(width, height, rgbs);
  }

  public BWImage clip(int x, int y, int w, int h) {
    return clip(new Rectangle(x, y, w, h));
  }

  private Rectangle fixClipRect(Rectangle r) {
    return r.intersection(new Rectangle(0, 0, width, height));
  }

  /** this should be multithread-safe */
  public BWImage clip(Rectangle r) {
    r = fixClipRect(r);
    byte[] newPixels = new byte[r.height*r.width];
    for (int y = 0; y < r.height; y++)
      for (int x = 0; x < r.width; x++)
        newPixels[y*r.width+x] = getByte(r.x+x, r.y+y);
    return new BWImage(r.width, r.height, newPixels);
  }

  public void setPixel(int x, int y, float brightness) {
    storage.setByte(x, y, toByte(fixPixel(brightness)));
  }

  public void setByte(int x, int y, byte brightness) {
    storage.setByte(x, y, brightness);
  }

  private float fixPixel(float pixel) {
    return Math.max(0, Math.min(1, pixel));
  }

  public float getBorderColor() {
    return borderColor;
  }

  public void setBorderColor(float borderColor) {
    this.borderColor = borderColor;
  }

  public boolean anyPixelBrighterThan(double threshold) {
    for (int y = 0; y < height; y++)
      for (int x = 0; x < width; x++)
        if (getPixel(x, y) > threshold)
          return true;
    return false;
  }
  
  BufferedImage getBufferedImage() {
    //ret toRGB().getBufferedImage();
    
    BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);
    for (int y = 0; y < height; y++)
      for (int x = 0; x < width; x++) {
        int b = ((int) getByte(x, y) & 0xFF);
        bufferedImage.setRGB(x, y, b*0x010101);
      }
    return bufferedImage; 
  }
  
  byte[] getBytes() {
    return storage.pixels;
  }
}

static class BWImageSimpleStorage {
  int width, height;
  byte[] pixels;
  
  // for unstructure()
  BWImageSimpleStorage() {}

  public BWImageSimpleStorage(int width, int height, byte[] pixels) {
    this.width = width;
    this.height = height;
    this.pixels = pixels;
  }

  public void setByte(int x, int y, byte b) {
    pixels[y*width+x] = b;
  }

  public byte getByte(int x, int y) {
    return pixels[y*width+x];
  }
}

static class Var<A> {
  A v; // you can access this directly if you use one thread
  
  Var() {}
  Var(A v) {
  this.v = v;}
  
  synchronized void set(A a) { v = a; }
  synchronized A get() { return v; }
  synchronized boolean has() { return v != null; }
}

static class RGB {
  public final float r, g, b;

  public RGB(float r, float g, float b) {
    this.r = r;
    this.g = g;
    this.b = b;
  }

  public RGB(double r, double g, double b) {
    this.r = (float) r;
    this.g = (float) g;
    this.b = (float) b;
  }

  public RGB(double brightness) {
    this.r = this.g = this.b = (float) brightness;
  }

  public RGB(Color color) {
    this.r = color.getRed()/255f;
    this.g = color.getGreen()/255f;
    this.b = color.getBlue()/255f;
  }

  public RGB(String hex) {
    r = Integer.parseInt(hex.substring(0, 2), 16)/255f;
    g = Integer.parseInt(hex.substring(2, 4), 16)/255f;
    b = Integer.parseInt(hex.substring(4, 6), 16)/255f;
  }

  public float getComponent(int i) {
    return i == 0 ? r : i == 1 ? g : b;
  }

  public Color getColor() {
    return new Color(r, g, b);
  }

  public static RGB newSafe(float r, float g, float b) {
    return new RGB(Math.max(0, Math.min(1, r)), Math.max(0, Math.min(1, g)), Math.max(0, Math.min(1, b)));
  }

  public int asInt() {
    return getColor().getRGB() & 0xFFFFFF;
  }

  public float getBrightness() {
    return (r+g+b)/3.0f;
  }

  public String getHexString() {
    return Integer.toHexString(asInt() | 0xFF000000).substring(2).toUpperCase();
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (!(o instanceof RGB)) return false;

    RGB rgb = (RGB) o;

    if (Float.compare(rgb.b, b) != 0) return false;
    if (Float.compare(rgb.g, g) != 0) return false;
    if (Float.compare(rgb.r, r) != 0) return false;

    return true;
  }

  @Override
  public int hashCode() {
    int result = (r != +0.0f ? Float.floatToIntBits(r) : 0);
    result = 31 * result + (g != +0.0f ? Float.floatToIntBits(g) : 0);
    result = 31 * result + (b != +0.0f ? Float.floatToIntBits(b) : 0);
    return result;
  }

  public boolean isBlack() {
    return r == 0f && g == 0f && b == 0f;
  }

  public boolean isWhite() {
    return r == 1f && g == 1f && b == 1f;
  }

  public String toString() {
    return getHexString();
  }
}

static class RGBImage {
  transient BufferedImage bufferedImage;
  File file;
  int width, height;
  int[] pixels;

  // color returned when getPixel is called with out-of-bounds position
  int background = 0xFFFFFF;
  
  RGBImage() {}

  RGBImage(BufferedImage image) {
    this(image, null);
  }

  RGBImage(BufferedImage image, File file) {
    this.file = file;
    bufferedImage = image;
    width = image.getWidth();
    height = image.getHeight();
    pixels = new int[width*height];
    PixelGrabber pixelGrabber = new PixelGrabber(image, 0, 0, width, height, pixels, 0, width);
    try {
      if (!pixelGrabber.grabPixels())
        throw new RuntimeException("Could not grab pixels");
      cleanPixels(); // set upper byte to 0
    } catch (InterruptedException e) {
      throw new RuntimeException(e);
    }
  }

  /** We assume it's a file name to load from */
  RGBImage(String file) throws IOException {
    this(new File(file));
  }

  RGBImage(Dimension size, Color color) {
    this(size.width, size.height, color);
  }

  RGBImage(Dimension size, RGB color) {
    this(size.width, size.height, color);
  }

  private void cleanPixels() {
    for (int i = 0; i < pixels.length; i++)
      pixels[i] &= 0xFFFFFF;
  }

  RGBImage(int width, int height, int[] pixels) {
    this.width = width;
    this.height = height;
    this.pixels = pixels;
  }

  RGBImage(int w, int h, RGB[] pixels) {
    this.width = w;
    this.height = h;
    this.pixels = asInts(pixels);
  }

  public static int[] asInts(RGB[] pixels) {
    int[] ints = new int[pixels.length];
    for (int i = 0; i < pixels.length; i++)
      ints[i] = pixels[i] == null ? 0 : pixels[i].getColor().getRGB();
    return ints;
  }

  public RGBImage(int w, int h) {
    this(w, h, Color.black);
  }
  
  RGBImage(int w, int h, RGB rgb) {
    this.width = w;
    this.height = h;
    this.pixels = new int[w*h];
    int col = rgb.asInt();
    if (col != 0)
      for (int i = 0; i < pixels.length; i++)
        pixels[i] = col;
  }

  RGBImage(RGBImage image) {
    this(image.width, image.height, copyPixels(image.pixels));
  }

  RGBImage(int width, int height, Color color) {
    this(width, height, new RGB(color));
  }

  RGBImage(File file) throws IOException {
    this(javax.imageio.ImageIO.read(file));
  }

  private static int[] copyPixels(int[] pixels) {
    int[] copy = new int[pixels.length];
    System.arraycopy(pixels, 0, copy, 0, pixels.length);
    return copy;
  }

  public int getIntPixel(int x, int y) {
    if (inRange(x, y))
      return pixels[y * width + x];
    else
      return background;
  }

  public static RGB asRGB(int packed) {
    int r = (packed >> 16) & 0xFF;
    int g = (packed >> 8) & 0xFF;
    int b = packed & 0xFF;
    return new RGB(r / 255f, g / 255f, b / 255f);
  }

  public RGB getRGB(int x, int y) {
    if (inRange(x, y))
      return asRGB(pixels[y * width + x]);
    else
      return new RGB(background);
  }

  /** alias of getRGB - I kept typing getPixel instead of getRGB all the time, so I finally created it */
  public RGB getPixel(int x, int y) {
    return getRGB(x, y);
  }

  public int getWidth() {
    return width;
  }

  public int getHeight() {
    return height;
  }

  /** Attention: cached, i.e. does not change when image itself changes */
  /** @NotNull */
  public BufferedImage getBufferedImage() {
    if (bufferedImage == null) {
      bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
      //bufferedImage.setData(Raster.createRaster(new SampleModel()));
      for (int y = 0; y < height; y++)
        for (int x = 0; x < width; x++)
          bufferedImage.setRGB(x, y, pixels[y*width+x]);
    }
    return bufferedImage;
  }

  public RGBImage clip(Rectangle r) {
    r = fixClipRect(r);
    int[] newPixels;
    try {
      newPixels = new int[r.width*r.height];
    } catch (RuntimeException e) {
      System.out.println(r);
      throw e;
    }
    for (int y = 0; y < r.height; y++) {
      System.arraycopy(pixels, (y+r.y)*width+r.x, newPixels, y*r.width, r.width);
    }
    return new RGBImage(r.width, r.height, newPixels);
  }

  private Rectangle fixClipRect(Rectangle r) {
    r = r.intersection(new Rectangle(0, 0, width, height));
    if (r.isEmpty())
      r = new Rectangle(r.x, r.y, 0, 0);
    return r;
  }

  public File getFile() {
    return file;
  }

  /** can now also do GIF (not just JPEG) */
  public static RGBImage load(String fileName) {
    return load(new File(fileName));
  }

  /** can now also do GIF (not just JPEG) */
  public static RGBImage load(File file) {
    try {
      BufferedImage bufferedImage = javax.imageio.ImageIO.read(file);
      return new RGBImage(bufferedImage);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  public int getInt(int x, int y) {
    return pixels[y * width + x];
  }

  public void save(File file) throws IOException {
    String name = file.getName().toLowerCase();
    String type;
    if (name.endsWith(".png")) type = "png";
    else if (name.endsWith(".jpg") || name.endsWith(".jpeg")) type = "jpeg";
    else throw new IOException("Unknown image extension: " + name);
    javax.imageio.ImageIO.write(getBufferedImage(), type, file);
  }

  public static RGBImage dummyImage() {
    return new RGBImage(1, 1, new int[] {0xFFFFFF});
  }

  public int[] getPixels() {
    return pixels;
  }

  public void setPixel(int x, int y, RGB rgb) {
    if (x >= 0 && y >= 0 && x < width && y < height)
      pixels[y*width+x] = rgb.asInt();
  }

  public void setPixel(int x, int y, Color color) {
    setPixel(x, y, new RGB(color));
  }

  public void setPixel(int x, int y, int rgb) {
    if (x >= 0 && y >= 0 && x < width && y < height)
      pixels[y*width+x] = rgb;
  }

  public RGBImage copy() {
    return new RGBImage(this);
  }

  public boolean inRange(int x, int y) {
    return x >= 0 && y >= 0 && x < width && y < height;
  }

  public int getBackground() {
    return background;
  }

  public void setBackground(int background) {
    this.background = background;
  }

  public Dimension getSize() {
    return new Dimension(width, height);
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    RGBImage rgbImage = (RGBImage) o;

    if (height != rgbImage.height) return false;
    if (width != rgbImage.width) return false;
    if (!Arrays.equals(pixels, rgbImage.pixels)) return false;

    return true;
  }

  @Override
  public int hashCode() {
    int result = width;
    result = 31 * result + height;
    result = 31 * result + Arrays.hashCode(pixels);
    return result;
  }

  public String getHex(int x, int y) {
    return getPixel(x, y).getHexString();
  }

  public RGBImage clip(int x, int y, int width, int height) {
    return clip(new Rectangle(x, y, width, height));
  }

  public RGBImage clipLine(int y) {
    return clip(0, y, width, 1);
  }

  public int numPixels() {
    return width*height;
  }
}



static void swingLater(long delay, final Runnable r) {
  javax.swing.Timer timer = new javax.swing.Timer(toInt(delay), new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent _evt) {
    r.run();
  }});
  timer.setRepeats(false);
  timer.start();
}

static void swingLater(Runnable r) {
  SwingUtilities.invokeLater(r);
}

static void swingNowOrLater(Runnable r) {
  if (isAWTThread())
    r.run();
  else
    swingLater(r);
}
static File getProgramDir() {
  return programDir();
}

static File getProgramDir(String snippetID) {
  return programDir(snippetID);
}
static boolean equals(Object a, Object b) {
  return a == null ? b == null : a.equals(b);
}
static void awtLater(int delay, final Runnable r) {
  swingLater(delay, r);
}

static void awtLater(Runnable r) {
  swingLater(r);
}

static boolean inRange(int x, int n) {
  return x >= 0 && x < n;
}
static int asInt(Object o) {
  return toInt(o);
}
static void popup(final Throwable throwable) {
  popupError(throwable);
}

static void popup(final String msg) {
  print(msg);
  SwingUtilities.invokeLater(new Runnable() {
    public void run() {
      JOptionPane.showMessageDialog(null, msg);
    }
  });
}


  static void popupError(final Throwable throwable) {
    throwable.printStackTrace(); // print stack trace to console for the experts
    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        String text = throwable.toString();
        //text = cutPrefix(text, "java.lang.RuntimeException: ");
        JOptionPane.showMessageDialog(null, text);
      }
    });
  }
static File programDir_mine; // set this to relocate program's data

static File programDir() {
  return programDir(getProgramID());
}

static File programDir(String snippetID) {
  if (programDir_mine != null && sameSnippetID(snippetID, programID()))
    return programDir_mine;
  return new File(javaxDataDir(), formatSnippetID(snippetID));
}

static int toInt(Object o) {
  if (o == null) return 0;
  if (o instanceof Number)
    return ((Number) o).intValue();
  if (o instanceof String)
    return parseInt((String) o);
  throw fail("woot not int: " + getClassName(o));
}

static int toInt(long l) {
  if (l != (int) l) throw fail("Too large for int: " + l);
  return (int) l;
}


static boolean sameSnippetID(String a, String b) {
  return a != null && b != null && parseSnippetID(a) == parseSnippetID(b);
}
static File javaxDataDir_dir; // can be set to work on different base dir

static File javaxDataDir() {
  return javaxDataDir_dir != null ? javaxDataDir_dir : new File(userHome(), "JavaX-Data");
}
static String programID() {
  return getProgramID();
}
static int parseInt(String s) {
  return empty(s) ? 0 : Integer.parseInt(s);
}


static class ImageSurfaceSelector extends MouseAdapter {
  ImageSurface is;
  Point startingPoint;
  boolean enabled = true;

  ImageSurfaceSelector(ImageSurface is) {
  this.is = is;
    if (containsInstance(is.tools, ImageSurfaceSelector.class)) return;
    print("New selector");
    is.tools.add(this);
    is.addMouseListener(this);
    is.addMouseMotionListener(this);
  }

  public void mousePressed(MouseEvent evt) {
    if (evt.getButton() != MouseEvent.BUTTON1) return;
    if (enabled)
      startingPoint = getPoint(evt);
  }

  public void mouseDragged(MouseEvent e) {
    if (startingPoint != null) {
      Point endPoint = getPoint(e);
      Rectangle r = new Rectangle(startingPoint, new Dimension(endPoint.x-startingPoint.x+1, endPoint.y-startingPoint.y+1));
      normalize(r);
      is.setSelection(r);
    }
  }

  public static void normalize(Rectangle r) {
    if (r.width < 0) {
      r.x += r.width;
      r.width = -r.width;
    }
    if (r.height < 0) {
      r.y += r.height;
      r.height = -r.height;
    }
  }

  public void mouseReleased(MouseEvent e) {
    mouseDragged(e);
    if (getPoint(e).equals(startingPoint))
      is.setSelection(null);
    startingPoint = null;
  }
  
  Point getPoint(MouseEvent e) {
    return new Point((int) (e.getX()/is.getZoomX()), (int) (e.getY()/is.getZoomY()));
  }
}

static class PopupMenuHelper extends MouseAdapter {
  JPopupMenu menu;
  Point point;
  
  /** override me  */
  void fillMenu() {
  }

  public void mousePressed(MouseEvent e) {
    displayMenu(e);
  }

  public void mouseReleased(MouseEvent e) {
    displayMenu(e);
  }

  private void displayMenu(MouseEvent e) {
    boolean popupTrigger = e.isPopupTrigger();
    if (popupTrigger) {
      JPopupMenu menu = new JPopupMenu();
      int count = menu.getComponentCount();
      this.menu = menu;
      this.point = e.getPoint();
      fillMenu();
      this.menu = null;
      if (menu.getComponentCount() != count)
        menu.show(e.getComponent(), e.getX(), e.getY());
    }
  }

  public void install(JComponent component) {
    component.addMouseListener(this);
  }
}

static boolean containsInstance(Iterable i, Class c) {
  if (i != null) for (Object o : i)
    if (isInstanceX(c, o)) return true; return false;
}

}