2037468 - XUL popup not showing when switching display mode of ancestor in popupshowing

Status: NEW

(Core :: Layout, defect, P3)

Description

[Moritz Beier [:mbeier]]

Attachment: example.js

When changing display mode of a XUL popup or an ancestor inside a popupshowing listener, the popup doesn't show. Please refer to the attached mochitest for more details.

Comment 1

[Emilio Cobos Álvarez [:emilio]]

That is generally expected when rebuilding the layout tree of popups fwiw. The showing / etc state is kept in the layout tree.

Comment 2

[Emilio Cobos Álvarez [:emilio]]

Can you use something else other than poopupshowing? This seems pretty expected right now, and would be nontrivial to fix.

Comment 3

[Moritz Beier [:mbeier]]

Sure. You can close the bug if you think it's not worth fixing.