private Point getCaretLocation() {
Point loc = new Point();
TextAreaPainter painter = textArea.getPainter();
FontMetrics fm = painter.getFontMetrics();
int offsetY = fm.getHeight() - COMPOSING_UNDERBAR_HEIGHT;
int lineIndex = textArea.getCaretLine();
loc.y = lineIndex * fm.getHeight() + offsetY;
int offsetX = textArea.getCaretPosition() - textArea.getLineStartOffset(lineIndex);
loc.x = textArea.offsetToX(lineIndex, offsetX);
return loc;
}
private Rectangle getCaretRectangle(int x, int y) {
TextAreaPainter painter = textArea.getPainter();
Point origin = painter.getLocationOnScreen();
int height = painter.getFontMetrics().getHeight();
return new Rectangle(origin.x + x, origin.y + y, 0, height);
}