@Override
public void actionPerformed(ActionEvent e) {
JTextComponent textArea = (JTextComponent) e.getSource();
Caret caret = textArea.getCaret();
int dot = caret.getDot();
/*
* Move to the beginning/end of selection on a "non-shifted"
* left- or right-keypress. We shouldn't have to worry about
* navigation filters as, if one is being used, it let us get
* to that position before.
*/
if (!select) {
switch (direction) {
case SwingConstants.EAST:
int mark = caret.getMark();
if (dot != mark) {
caret.setDot(Math.max(dot, mark));
return;
}
break;
case SwingConstants.WEST:
mark = caret.getMark();
if (dot != mark) {
caret.setDot(Math.min(dot, mark));
return;
}
break;
default:
}
}
Position.Bias[] bias = new Position.Bias[1];
Point magicPosition = caret.getMagicCaretPosition();
try {
if (magicPosition == null
&& (direction == SwingConstants.NORTH || direction == SwingConstants.SOUTH)) {
Rectangle r = textArea.modelToView(dot);
magicPosition = new Point(r.x, r.y);
}
NavigationFilter filter = textArea.getNavigationFilter();
if (filter != null) {
dot =
filter.getNextVisualPositionFrom(
textArea, dot, Position.Bias.Forward, direction, bias);
} else {
if (direction == SwingConstants.NORTH || direction == SwingConstants.SOUTH) {
dot = getNSVisualPosition((EditorPane) textArea, dot, direction);
} else {
dot =
textArea
.getUI()
.getNextVisualPositionFrom(
textArea, dot, Position.Bias.Forward, direction, bias);
}
}
if (select) {
caret.moveDot(dot);
} else {
caret.setDot(dot);
}
if (magicPosition != null
&& (direction == SwingConstants.NORTH || direction == SwingConstants.SOUTH)) {
caret.setMagicCaretPosition(magicPosition);
}
} catch (BadLocationException ble) {
Debug.error(me + "Problem while trying to move caret\n%s", ble.getMessage());
}
}
