With the old solution I replaced tabs with four spaces and then did
some calculations to get the correct byte positions for a coordinate.
With the new solution (using FontMetric.horizontalAdvance) this is not
necessary anymore and we can use tha native tab.
But I cannot change the tab width. It is always 8 characters.
You can set tabStopDistance on horizontalAdvance(), but not on
elided_text() and I did not find a way to use it while rendering text.
Andreas Huber
d9c362419b