/**
* Updates the interal bitset from <code>iterator</code>. This will set <code>validMask</code> to
* true if <code>iterator</code> is non-null.
*/
private void updateMask(AttributedCharacterIterator iterator) {
if (iterator != null) {
validMask = true;
this.iterator = iterator;
// Update the literal mask
if (literalMask == null) {
literalMask = new BitSet();
} else {
for (int counter = literalMask.length() - 1; counter >= 0; counter--) {
literalMask.clear(counter);
}
}
iterator.first();
while (iterator.current() != CharacterIterator.DONE) {
Map attributes = iterator.getAttributes();
boolean set = isLiteral(attributes);
int start = iterator.getIndex();
int end = iterator.getRunLimit();
while (start < end) {
if (set) {
literalMask.set(start);
} else {
literalMask.clear(start);
}
start++;
}
iterator.setIndex(start);
}
}
}
/**
* Returns the start of the first run that contains the attribute <code>id</code>. This will
* return <code>-1</code> if the attribute can not be found.
*/
int getAttributeStart(AttributedCharacterIterator.Attribute id) {
if (isValidMask()) {
AttributedCharacterIterator iterator = getIterator();
iterator.first();
while (iterator.current() != CharacterIterator.DONE) {
if (iterator.getAttribute(id) != null) {
return iterator.getIndex();
}
iterator.next();
}
}
return -1;
}
/**
* Returns the number of occurences of <code>f</code> before the location <code>start</code> in
* the current <code>AttributedCharacterIterator</code>.
*/
private int getFieldTypeCountTo(Object f, int start) {
AttributedCharacterIterator iterator = getIterator();
int count = 0;
if (iterator != null && (f instanceof AttributedCharacterIterator.Attribute)) {
AttributedCharacterIterator.Attribute field = (AttributedCharacterIterator.Attribute) f;
int index = 0;
iterator.first();
while (iterator.getIndex() < start) {
while (iterator.getAttribute(field) == null && iterator.next() != CharacterIterator.DONE) ;
if (iterator.current() != CharacterIterator.DONE) {
iterator.setIndex(iterator.getRunLimit(field));
iterator.next();
count++;
} else {
break;
}
}
}
return count;
}
/** Selects the fields identified by <code>attributes</code>. */
void selectField(Object f, int count) {
AttributedCharacterIterator iterator = getIterator();
if (iterator != null && (f instanceof AttributedCharacterIterator.Attribute)) {
AttributedCharacterIterator.Attribute field = (AttributedCharacterIterator.Attribute) f;
iterator.first();
while (iterator.current() != CharacterIterator.DONE) {
while (iterator.getAttribute(field) == null && iterator.next() != CharacterIterator.DONE) ;
if (iterator.current() != CharacterIterator.DONE) {
int limit = iterator.getRunLimit(field);
if (--count <= 0) {
getFormattedTextField().select(iterator.getIndex(), limit);
break;
}
iterator.setIndex(limit);
iterator.next();
}
}
}
}
