/**
* Moves the cursor down. The current column position is remembered in {@link #lastCol} and, if
* possible, restored.
*
* @param l number of lines to move cursor
* @param mark mark flag
*/
private void down(final int l, final boolean mark) {
if (!mark) text.noMark();
final int x = text.bol(mark);
if (lastCol == -1) lastCol = x;
for (int i = 0; i < l; ++i) {
text.eol(mark);
text.next(mark);
}
text.forward(lastCol, mark);
if (text.pos() == text.size()) lastCol = -1;
}
/**
* Moves the cursor up.
*
* @param l number of lines to move cursor
* @param mark mark flag
*/
private void up(final int l, final boolean mark) {
if (!mark) text.noMark();
final int x = text.bol(mark);
if (lastCol == -1) lastCol = x;
if (text.pos() == 0) {
lastCol = -1;
return;
}
for (int i = 0; i < l; ++i) {
text.prev(mark);
text.bol(mark);
}
text.forward(lastCol, mark);
}