public List<Rule> findAllRules() {
IntegerElement x, y;
ArrayList<Rule> rules = new ArrayList<Rule>();
for (x = (IntegerElement) getMinX(); x.compareTo(getMaxX()) <= 0; x = x.succ()) {
for (y = (IntegerElement) getMinY(); y.compareTo(getMaxY()) <= 0; y = y.succ()) {
boolean escaped = (!y.isZero() && get(x, y.pred()).getChar() != ' ');
if (escaped) continue;
if (get(x, y).getChar() == '(') {
// System.out.println("Found a rule start at " + x + ", " + y);
IntegerElement x2 = x;
CharacterElement g = get(x2, y);
while (g.getChar() != ')' && x2.compareTo(getMaxX()) <= 0) {
x2 = x2.succ();
g = get(x2, y);
}
if (g.getChar() != ')') continue;
// System.out.println("Found a rule from " + x + "," + y + " to " + x2);
CharacterElement w = get(x2.pred(), y);
if (w.getChar() == ' ') w = null;
Rule r = new Rule(this, x.succ(), y.succ(), (x2.subtract(x)).pred(), w);
rules.add(r);
}
}
}
return rules;
}
/*
* We assume a match was made at the given position.
*/
public void applyRule(Rule r, Position p) {
IntegerElement i, j;
CharacterElement wildcard = r.getWildcard();
// System.out.printf("applying at %s: %s", p.toString(), r.dump());
/* Note that r.getHeight() == width/2 ... */
for (i = IntegerElement.ZERO; i.compareTo(r.getHeight()) < 0; i = i.succ()) {
for (j = IntegerElement.ZERO; j.compareTo(r.getHeight()) < 0; j = j.succ()) {
CharacterElement replacement = r.get(i.add(r.getHeight()), j);
IntegerElement destX = p.getX().add(i);
IntegerElement destY = p.getY().add(j);
// System.out.printf("(%s,%s): [%s] '%s' -> (%s,%s)\n", i, j, wildcard,
// replacement.getChar(), destX, destY);
if (wildcard == null || wildcard.getChar() != replacement.getChar()) {
set(destX, destY, replacement);
}
}
}
}
public boolean match(CharacterElement sought, CharacterElement candidate) {
if (wildcard != null && sought.getChar() == wildcard.getChar()) {
return true;
}
return candidate.equals(sought);
}