import rita.*;

int MAX_LINE_LENGTH = 80;

RiText[] rts;
RiGrammar grammar;
ArrayList buf = new ArrayList();
boolean clicked, drawRectangle = true;

void setup()
{    
  size(600, 300);
  RiText.loadFont("TimesNewRomanRiSMT-15.vlw");    

  // create a new grammar 
  grammar = new RiGrammar(this, "michaelgrammar4.g");    
}

void draw() {
  background(0);    
  for (int i = 0; i < rts.length; i++) {
    rts[i].textAlign(RiText.LEFT);
    rts[i].draw();
  }
  if (drawRectangle) {
    stroke(255);
    rect(25,20,515,240);
  }
}

void mouseClicked() {

  clicked = true;

  // grab 10 lines from the grammar
  String[] lines = grammar.expand(10);
  
  buf.clear();
  for (int i = 0; i < lines.length; i++) {
    String line = lines[i];
    while (line.length() > MAX_LINE_LENGTH) {
      String toAdd = line.substring(0,MAX_LINE_LENGTH);
      line = line.substring(MAX_LINE_LENGTH, line.length());
      int idx = toAdd.lastIndexOf(" ");
      String end = "";

      if (idx >= 0) {
        end = toAdd.substring(idx, toAdd.length());      
        toAdd = toAdd.substring(0,idx); 
      }
      buf.add(toAdd);
      line = end + line; 
    }
    buf.add(line);
  }
  setLinesForPage();
}

void setLinesForPage() {
  RiText[] rts = new RiText[10];
  for (int i = 0; i < buf.size(); i++) {
    if (i == rts.length) break;
    String line = buf.get(i)+"";
    rts[i] = new RiText(this,line,40,50+20*i);
  }
  for (int i = 0; i < rts.length; i++) {
    if (buf.size()>0)
      buf.remove(0);
  } 
  if (rts[0] != null)
    rts[0].x += 2;
}

void keyPressed() {
  setLinesForPage();
}