TouchAdjust::snapTo() tries to adjust the given point to a place in the intersection of the touch-area and the target. Unfortunately it doesn't do a very good job when it comes to non-rectilinear targets, and the adjusted point is not always restricted to the touch area.
Created attachment 162746 [details]
Comment on attachment 162746 [details]
That is ok.
We know that there might be fixed pos elements at the place where to snap things to. I remember we have a bug for this, I think.
Committed r128757: <http://trac.webkit.org/changeset/128757>