To more properly support Linux having a different default at runtime.
Expose the resolved value in appinfo for convenience, and use it in the
front-end as needed.
Differential Revision: https://phabricator.services.mozilla.com/D129004
We always use alpha visual for WebRender, and appearance: none is
unnecessary (root element has no intrinsic appearance).
Differential Revision: https://phabricator.services.mozilla.com/D128682
This bit is taken straight from D73454 (I reviewed it but I guess
another pair of eyes is ok, it's really straight-forward).
Co-authored-by: Nicklas Boman <smurfd@gmail.com>
Differential Revision: https://phabricator.services.mozilla.com/D128679
We make it work on macOS by setting pointer-events: none + opacity: 0 rather
than visibility: hidden, and tweaking the caching setup to be Android-like.
Now that the scrollbars sheet is the same across platforms, move it to where
the rest of the UA sheets are. This way we guarantee that the RDM vs. Android
difference is less (just the ifdef at the top of the sheet).
Depends on D128084
Differential Revision: https://phabricator.services.mozilla.com/D128085
The specifics of how this is going to work are still getting spec'd /
discussed in https://github.com/w3c/csswg-drafts/issues/6576, but this
allows DevTools to work fine and the feature to be complete enough for
Nightly experimentation (with the other in-flight patches).
Otherwise devtools crashes when trying to inspect pages that use them.
Differential Revision: https://phabricator.services.mozilla.com/D124656
See the discussion here: https://twitter.com/Rich_Harris/status/1433153204678799365
This should make attribute selectors roughly as fast as class selectors.
I think it's worth trying and see if perf bots complain on
micro-benchmarks and stylebench and such.
I made attributes more specific than local names, but less specific than
classes, which I think makes sense. When doing something like
foo[data-bar], filtering by data-bar seems likely to yield less elements
than filtering by foo.
While at it, remove the bloom filter pref since we shipped it in
bug 1704551 for 87 and we haven't heard complaints.
Differential Revision: https://phabricator.services.mozilla.com/D124383
Instead, fix up the various content data structures when the stylesheet
is mutated. This makes reading a stylesheet not disable style sharing.
Differential Revision: https://phabricator.services.mozilla.com/D115203
It's very hot when matching some kind of selectors like the ones in bug
1717267, and the two function calls show up in the profiles.
Differential Revision: https://phabricator.services.mozilla.com/D119505
This will allow detecting the system theme, which allows fixing some of
the blocked bugs.
Note that when using the system theme we will still match light or dark
appropriately, so this shouldn't change behavior just yet.
Differential Revision: https://phabricator.services.mozilla.com/D113516
This adds a new @media query -moz-toolbar-prefers-color-scheme which works like
prefers-color-scheme but is set based on the browser theme rather than the OS
theme. The background colour of the toolbar is used to determine the theme
dark/light preference. This will be used for in-content common.css pages and
other UI elements that include that stylesheet in the browser-chrome through
shadow DOM.
The end result is that about: pages, infobars, and modals will now "match" the
browser theme (just light/dark mode, not LWT theming support).
Differential Revision: https://phabricator.services.mozilla.com/D111486
Safari does this. This reduces the runtime in the example linked from
comment 0 quite a lot (40ms on a local opt build, from ~130ms on a
release nightly build).
I added a pref because there's a slight chance of performance
regressions on pages that do not use attribute selectors, as we're now
doing more unconditional work per element (adding the attributes to the
bloom filter). But the trade-off should be worth it, I think.
Differential Revision: https://phabricator.services.mozilla.com/D111689
There's no reason we can't just query LookAndFeel and we need to use
sSystemMetrics. In the past, LookAndFeel queries were not cached, but
this is no longer the case, so perf wise should be pretty equivalent.
Note that we don't need the NS_SUCCEEDED checks because the default
value from GetInt if the platform doesn't support it is 0 anyways.
Differential Revision: https://phabricator.services.mozilla.com/D110805
This should be both a memory and speed win for pages using a lot of
Shadow DOM.
In order to make the cache properly work we need to start keying media query
results on the actual StyleSheetContents, as that's what we share on Gecko, but
that should all be fine.
Differential Revision: https://phabricator.services.mozilla.com/D107266
And alias :-moz-ui-valid and :-moz-ui-invalid to them.
There are CSSWG resolutions for these for quite a while, and spec for
user-invalid.
Differential Revision: https://phabricator.services.mozilla.com/D105966
No other browser supports anything like this and we don't even have
internal users. Only uses of this I've found on the wild were just
resetting the box shadow internal styling we added in bug 582277 (and
since removed in bug 600151).
Differential Revision: https://phabricator.services.mozilla.com/D105955
This shipped in 85, we can remove the feature flag now. Keep
:-moz-focusring as an alias to :focus-visible at parse time.
Differential Revision: https://phabricator.services.mozilla.com/D103752
This implements the basic image-set notation without the format()
function (for simplicity).
There's a remaining serialization issue (we should probably skip 1x
resolutions), but that's fine for now, I'll address this in a follow-up
when the feature is testable.
The intention is to do the image selection at computed value time
(keeping a selected index or such), but same, follow-up.
This also fixes an issue where the cors-mode for -moz-image-rect and
cross-fade() was getting ignored when parsing.
Differential Revision: https://phabricator.services.mozilla.com/D100640
These are never empty, and storing 4 elements inline seems worth it
given we also heap-allocate the array itself.
Depends on D100592
Differential Revision: https://phabricator.services.mozilla.com/D100593
