LibWeb: Prevent a popover crash and implement popovertarget #3285
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| auto const* popover_invoker_element = dynamic_cast<PopoverInvokerElement const*>(node.ptr()); | ||
| GC::Ptr<HTMLElement> popover_element = verify_cast<HTMLElement>(popover_invoker_element->m_popover_target_element.ptr()); |
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If node isn't a PopoverInvokerElement, this is a null dereference.
If we know it is one, then use verify_cast instead of dynamic_cast.
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That function is only ever called on FormAssociatedElements which are also PopoverInvokerElements, so neither dynamic_cast should fail. I don't know how to convince the compiler that a verify_cast is valid, so the best I can do is a VERIFY(popover_invoker_element).
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Using whatwg/html#9457 (with some changes made to catch up with the current spec) to fix a spec bug and a crash when removing a visible popover.
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The first commit is based on whatwg/html#9457 and prevents a crash when removing a visible popover.
That spec PR hasn't been merged yet and is currently slightly outdated, but the changes are spread throughout the code so I'm not sure what the best place to add a
FIXME/AD-HOCwould be.The second commit implements
popovertargetbuttons (and includes a change to top layer elements to prevent a crash when hiding and showing a popover in the same frame).This PR also fixes 29 crashing tests and gains at least 1656 new subtest passes.
(I may start a followup PR to update and implement the remaining parts of the popover spec)