Currently, we only zoom to the new initial scale iff we're exactly at initial scale before changing the view scale. This was done so that if a user zoomed in really far and then increased the view scale, we wouldn't end up zooming out as a result. Per conversation with Tim and Yongjun, we should consider changing the heuristics here, such that: • If the view scale is increasing and the new initial scale is greater than the current scale, zoom to initial scale. • Likewise, if the view scale is decreasing and the new initial scale is less than the current scale, zoom to initial scale.
Created attachment 362869 [details] Patch
Comment on attachment 362869 [details] Patch Clearing flags on attachment: 362869 Committed r242059: <https://trac.webkit.org/changeset/242059>
All reviewed patches have been landed. Closing bug.
<rdar://problem/48382246>