Christian, thanks for your efforts, but your solution still does not
work, you still get the width and heigth of the whole text pane.

But you pointed me in the right direction and I think I got it now. You
need to look at each row of each paragrah individually (i only have one
paragrah), determining the width and heigth of this row. Then you
create a new rectangle based on the width of the current row and the
heigth of this row and all previous rows.

Here is the code, in case anybody is interested. It works fine for me
and sets the boolean variable hit to true if the mouse is positioned
over text:

boolean hit=false;

Insets n = jCurrentSentencePane.getInsets();
Rectangle r=new Rectangle(n.left,n.top,0,0);

View sectionView =
jCurrentSentencePane.getUI().getRootView(jCurrentSentencePane).getView(0);

int paragraphCount = sectionView.getViewCount();

for (int paragraphIndex = 0; paragraphIndex < paragraphCount;
paragraphIndex++) {
View paragraphView = sectionView.getView(paragraphIndex);
                                        if (paragraphView instanceof ParagraphView) {
ParagraphView newparagraphView = (ParagraphView) paragraphView;
int rowCount=newparagraphView.getViewCount();
//oldHeigth contains the height of the previous row and is used to
update the y position
int oldHeight=0;
for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) {
View rowView= newparagraphView.getView(rowIndex);

r.width=(int) rowView.getPreferredSpan(View.X_AXIS);
r.y=r.y+oldHeight;
r.height=(int) (rowView.getPreferredSpan(View.Y_AXIS));

if(r.contains(e.getX(),e.getY()))
{
//The point was in the rectangle, i.e. mouse is over text
hit=true;
break;
}

oldHeight=(int) rowView.getPreferredSpan(View.Y_AXIS);
}
}
}

It's mighty complicated though, I would be happy to see a simpler
solution.

-- Sascha