Hi Anders, At this point in time, we see no reason to allow for non-zero padding in overflow:scroll regions because you can always just move the page into a unobstructed area and then scroll through that overflow region.
Thanks, Fady On Thu, Oct 6, 2011 at 1:43 PM, Anders Carlsson <ander...@apple.com> wrote: > Do you envision this being useful on overflow:scroll regions as well or is > it just frames? If it's just frames, then it seems like something we could > keep in ScrollView? (I haven't looked at the patch yet). > > - Anders > > On Oct 6, 2011, at 10:41 AM, Fady Samuel wrote: > > Hi Anders, > > Thanks for your reply. > > Yes, you are correct. This padding would be between the content and the > overhang area. > > Thanks, > > Fady > > On Thu, Oct 6, 2011 at 1:32 PM, Anders Carlsson <ander...@apple.com>wrote: > >> Hi Fady, >> >> so if I'm understanding correctly, in the context of rubber-band >> scrolling, this padding would be between the content and the overhang area? >> >> As far as constrainsScrollingToContentEdge goes, I'd like to get rid of it >> and just have two scroll functions, one that constrains to the content edge >> and one that doesn't. >> >> - Anders >> >> On Oct 6, 2011, at 10:03 AM, Fady Samuel wrote: >> >> Hi all, >> >> We'd like to provide a general mechanism in WebKit for embedders to scroll >> page content so that it is not hidden by embedder-provided UI elements that >> overlap the page. >> >> In some cases, if a floating UI element overlaps the edge of the page, >> we'd like to allow the embedder to scroll beyond the edge of the page to >> allow the hidden content to move to an area that isn't overlapped by UI >> elements. This feature is orthogonal to rubber band scrolling. >> >> One approach we considered taking is to allow the platform to set "scroll >> padding" to a FrameView/ScrollableArea to allow scrolling beyond the edge of >> the page. >> >> As a more concrete example, one can imagine a persistent Chromium >> extension that floats above the edge of the page. A link may lie behind the >> floating window. That link would be inaccessible unless the page is allowed >> to scroll beyond its edge. >> >> An experimental and incomplete implementation of this idea can be found >> here: https://bugs.webkit.org/show_bug.cgi?id=68184 >> >> After some additional consideration since this patch was posted, I don't >> believe scroll padding should interact with >> ScrollView::constrainsScrollingToContentEdge the way it does in the patch. >> Instead, I feel that scroll padding should be ignored >> if constrainsScrollingToContentEdge is false. That way rubber band scrolling >> is not affected at all by this. >> >> What are your thoughts and suggestions? Is this feature sufficiently >> general to be implemented in WebCore? What are your thoughts about its >> interaction with ScrollView::constrainsScrollingToContentEdge? >> >> Thanks, >> Fady >> _______________________________________________ >> webkit-dev mailing list >> webkit-dev@lists.webkit.org >> http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev >> >> >> > >
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