Michael Hynson
19ded9cd7e
- Adds `-moz-scrollbar-inset-block` and `-moz-scrollbar-inset-inline`, chrome-only
`<non-negative-length>{1,2}` longhands. Each names the scrollbar's axis it
applies to. The two values are the axis' logical start and end
and flip with the writing mode.
- ScrollContainerFrame::ScrollbarInsets() serves as the one place to extract the inset from for
both nsScrollbarFrame and GetBorderRadii
- Applies inset to nsScrollbarFrame::Reflow similar to stepper buttons
- ScrollContainerFrame::GetBorderRadii no longer squares a corner off when the
inset already holds the scrollbar clear of the curve.
- Forward the <browser> embedder's inset to a root scrollbar for the content viewport
- Add reftests for css-scrollbars
- This commit does NOT implement the css property anywhere
Differential Revision: https://phabricator.services.mozilla.com/D313900