зеркало из https://github.com/mozilla/gecko-dev.git
4b4ce0cdc3
At https://searchfox.org/mozilla-central/rev/2f29d53865cb895bf16c91336cc575aecd996a17/layout/generic/nsGfxScrollFrame.cpp#3166 we sort the scrollbar parts based on hovered state so that the hovered scrollbar is on top of a non-hovered scrollbar. This means that changing the hover state of a scrollbar can change the ordering of the scrollbar display items in the display list. So when the hover state changes we need to mark the frames modified. I'm guessing the reason this didn't come up before is because we needed a combination of scrollbars that don't have any style changes on hover and a platform that has hover events. I'm guessing GeckoView scrollbars don't have a style change on hover, and we don't commonly have a mouse or mouse like cursor device hooked up to GeckoView devies to have hover events. Except Firefox Reality has a cursor thingy so we see the problem there. Differential Revision: https://phabricator.services.mozilla.com/D48234 --HG-- extra : moz-landing-system : lando |
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