@Override
public int previousTab(int position) {
int tabStop = 0;
// Search for the first tab stop before the given position...
SortedSet<Integer> headSet = myTabStops.headSet(Integer.valueOf(position));
if (!headSet.isEmpty()) {
tabStop = headSet.last();
}
// Don't go beyond the start of the line...
return Math.max(0, tabStop);
}
@Override
public int nextTab(int position) {
int tabStop = Integer.MAX_VALUE;
// Search for the first tab stop after the given position...
SortedSet<Integer> tailSet = myTabStops.tailSet(position + 1);
if (!tailSet.isEmpty()) {
tabStop = tailSet.first();
}
// Don't go beyond the end of the line...
return Math.min(tabStop, (myWidth - 1));
}
public void resize(int columns) {
if (columns > myWidth) {
for (int i = myTabLength * (myWidth / myTabLength); i < columns; i += myTabLength) {
if (i >= myWidth) {
myTabStops.add(i);
}
}
} else {
Iterator<Integer> it = myTabStops.iterator();
while (it.hasNext()) {
int i = it.next();
if (i > columns) {
it.remove();
}
}
}
myWidth = columns;
}
@Override
public void setTabStop(int position) {
myTabStops.add(Integer.valueOf(position));
}
@Override
public void clearAllTabStops() {
myTabStops.clear();
}
@Override
public void clearTabStop(int position) {
myTabStops.remove(Integer.valueOf(position));
}
private void initTabStops(int columns, int tabLength) {
for (int i = tabLength; i < columns; i += tabLength) {
myTabStops.add(i);
}
}