I'd really appreciate any feedback on this thread from layout experts. I have a few ideas and some time to work on them, but I'd need to know if WebKit is interested on exploring them. I know it's a complex logic and the lack of specification does not help at all.
Thanks. On 07/09/17 16:40, Javier Fernandez wrote: > Hi, > > I've been working lately on some cases where selection shows an > unpredictable behavior when applied to cases with float elements; > basically, selection boundaries jump when dragging over floats. I've > found this old bug (https://webkit.org/b/101771) which described some of > these cases. I've attached another case with the same problem. > > This weird Selection's behavior is also present in Blink and Gecko: > - https://crbug.com/758526 > - https://bugzilla.mozilla.org/show_bug.cgi?id=1397514 > > I'm aware of the issues we have with Selection when the Render Tree > differs from the DOM Tree's structure, but that's not the case of the > examples I've been evaluating so far; I think for these cases we can do > better. > > My theory is that the root cause of this issue in most, if not all, the > cases is that we are not considering floats as valid HitTest candidates. > Additionally, we exclude floats from the positionForPoint logic, > implemented in the different render objects. > > I'm evaluating a preliminary approach based on considering floats as > valid HitTest candidates. I started to address a very specific case in > https://webkit.org/b/176096 and, if it gets enough support, I have plans > to continue addressing as many cases as possible. > > I think we have to assume that we will have issues with floats when they > create complex render trees, like it happens with other layout models, > but at least we can improve the simplest cases. > > I appreciate any feedback on my current approach and reviews of my > patches, if we finally want to give this proposal a shot. > > > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-dev > _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org https://lists.webkit.org/mailman/listinfo/webkit-dev
