[webkit-dev] How does WebKit draw an underline when an anchor has the mouse focus?

[ying lcs]

Hi,

When I move my mouse over an anchor, webkit draws an underline for
each line of the text of the anchor.

For example, in nytimes.com.

Can you please point me to the code where webkit figures out how many
lines it needs to draw (1 line for each line of text) and how long of
each line need to be drawn.

Thank you.