Hi, Thanks a lot for replying again. I'll look into it more but it already makes sense!
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. I think I need to implement my own function to get and set a custom parameter, right? I can then check for this parameter from the two parts you referenced. And I can set the parameter from GetFramesForArea() which constructs the nsDisplayListBuilder. 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. I made this screen recording to give an idea of my end goal: https://youtu.be/EtH1MMDorKA I basically want to visualize the position of all visible elements on a webpage, with all CSS rules applied and in the right visual order (z-order). In real time. The only elements I want to leave out are elements with display:none. As you can see in the video I still have some issues with elements within scrolling elements... On Monday, 2 May 2016 18:50:28 UTC+2, [email protected] wrote: > Sorry for the delayed response! I'm not actually subscribed to this list, and > I thought replies would be automatically cc'd to me. > > On Sunday, April 24, 2016 at 6:12:31 AM UTC-4, [email protected] wrote: > > I'm still stuck with a few things. Just like elementsFromPoint() my > > function currently ignores nodes with pointer-events:none; or > > visibility:hidden; (and maybe more). I only want to ignore nodes with > > display:none; Where can I override this? > > It looks like visibility:none is checked here [1] and pointer-events:none is > checked here [2]. > > Both of those functions have an nsDisplayListBuilder* argument, so you could > do something like this: > > - add a flag to nsDisplayListBuilder, whether it should ignore > visibility:none and pointer-events:none > - condition the above checks on the flag not being set > - add a corresponding option to GetFramesForArea() > - when GetFramesForArea() constructs the nsDisplayListBuilder, > set the flag is the option is set > - for your call to GetFramesForArea(), set the option > > Hope that made sense. > > If you give some more details about your end goal, we may be able to suggest > solutions that are easier / involve writing less custom code. > > Cheers, > Botond > > [1] > https://dxr.mozilla.org/mozilla-central/rev/1461a4071341c282afcf7b72e33036412d2251d4/layout/generic/nsFrame.cpp#6295 > [2] > https://dxr.mozilla.org/mozilla-central/rev/1461a4071341c282afcf7b72e33036412d2251d4/layout/base/nsDisplayList.cpp#2061 _______________________________________________ dev-tech-layout mailing list [email protected] https://lists.mozilla.org/listinfo/dev-tech-layout
