I noticed I'm still missing some elements. Children of button HTML elements aren't returned by elementsFromPoint. You can see it in this fiddle: https://jsfiddle.net/ztg9gppt/2/
Google Chrome does return the children within button elements, even divs. Twitter is nesting divs within buttons on their feed. Has it been a deliberate choice to leave out the children of button elements? Can I make another workaround or should this be reported as a bug? On Friday, 6 May 2016 23:15:35 UTC+2, [email protected] wrote: > Thanks again for replying! > > I was able to get everything working with your instructions :) > I also applied the same method to ignore backface-visibility:hidden; > This check is done here: > https://dxr.mozilla.org/mozilla-central/rev/e5a10bc7dac4ee2453d8319165c1f6578203eac7/layout/base/nsDisplayList.cpp#6018 > > Hopefully I'm now only excluding elements with display:none and elements > which aren't visible because their outside the visible part of a scrollable > HTML element. > > Another thing I realized I should do was calling GetPrimaryFrame() on the > dom::Element* I got from GetFramesForArea(). This way I could filter only the > primary frames, which correspond to the HTML elements. Now I no longer have > duplicate HTML tags in my output. This also filters out the list decoration > of ul and ol elements and the scrollbars. > > And sorry about the video! I forgot to turn that on. But the video wasn't > very good anyway. > > Thanks for the help and I'll post my final result when I've got something to > show. > > On Thursday, 5 May 2016 01:59:34 UTC+2, [email protected] wrote: > > On Monday, May 2, 2016 at 4:55:13 PM UTC-4, [email protected] wrote: > > > Does it means I also have to modify nsDisplayList.h in order to add the > > > flag to nsDisplayListBuilder? I'm still a bit unsure how to add a flag to > > > nsDisplayListBuilder. > > > > Just add a new member variable, like mIgnoreVisibility (and a getter/setter > > for it, if it's not public). > > > > > In my brief testing I noticed that overriding the pointer-events check in > > > nsDisplayList::HitTest() allows me to also retrieve elements with > > > pointer-events:none. Though strangely no iframes with > > > pointer-events:none. Those are still left out. > > > > Ah, there is a separate check for iframes here [1]! > > > > > I made this screen recording to give an idea of my end goal: > > > https://youtu.be/EtH1MMDorKA > > > > The video is private, I can't access it. > > > > Cheers, > > Botond > > > > [1] > > https://dxr.mozilla.org/mozilla-central/rev/369a5ee3a2880a4a98df3a00bf3db8d8f36b181b/layout/generic/nsSubDocumentFrame.cpp#379 _______________________________________________ dev-tech-layout mailing list [email protected] https://lists.mozilla.org/listinfo/dev-tech-layout
