Corresponds to part of https://github.com/whatwg/html/pull/9841 and then
https://github.com/whatwg/html/pull/11047
Adding `Auto` as a type state feels a little odd, as it's not an actual
type allowed in HTML. However, it's the default state when the value is
missing or invalid, which works out the same, as long as we never
serialize "auto", which we don't.
Analysis of selectors on modern websites shows that the `:hover`
pseudo-class is mostly used in the subject position within relatively
simple selectors like `.a:hover`. This suggests that we could greatly
benefit from segregating them by id/class/tag name, this way reducing
number of selectors tested during hover style invalidation.
With this change, hover invalidation on Discord goes down from 70ms to
3ms on my machine. I also tested GMail and GitHub where this change
shows nice 2x-3x speedup.
This is required to store Content Security Policies, as their
Directives are implemented as subclasses with overridden virtual
functions. Thus, they cannot be stored as generic Directive classes, as
it'll lose the ability to call overridden functions when they are
copied.
This avoids static builds putting the "no-op" implementation of
PlaybackStream::create() in the static archive before the strong
implementation later. On ELF (and probably PE/COFF too), a weak
definition in a static archive is chosen and locked-in as the
definition before a strong definition later in the archive.
Before this change, static builds would have no audio support
at all.
Regressed in 036327332f.
This commit moves the optimization a little later in replaceData(),
still avoiding relayout (the important part).
Recovers 480 points on WPT. :^)
This change updates the contents of the AriaRoles.json file to match the
data in the Characteristics tables in the ARIA spec — at, for example,
https://w3c.github.io/aria/#application.
Most of the changes are to match the “Supported States and Properties”
and “Inherited States and Properties” data — but some changes are to
match the “Name From” data and “Accessible Name Required” data.
This change also intentionally removes all states and properties the
Characteristics tables list as “deprecated on this role in ARIA 1.2”.
This fixes an issue where `vertical-align: middle` would incorrectly
shift the text away from the natural alphabetic baseline.
Fixing this makes many WPT table tests work correctly, so I'm also
importing one of them here. :^)
We were incorrectly treating cellpadding=0 as if the attribute was
missing. This commit fixes it so it behaves as `padding: 0` on cells.
When adding a test, I discovered that we were not invalidating style for
cells when their containing table's cellpadding attribute changed.
So this commit fixes that as well.
This removes the use of StringBuilder::OutputType (which was ByteString,
and only used by the JSON classes). And it removes the StringBuilder
template parameter from the serialization methods; this was only ever
used with StringBuilder, so a template is pretty overkill here.
This implementation can be better improved in the future by ripping
out a lot of the manual logic in LibWebSocket and rely on libcurl to
parse our message payloads. But for now, this uses the 'raw mode' of
curl websockets in connect-only mode to allow for somewhat seamless
integration into our event loop.
The previous implementation would call send a half-dozen times
when sending each frame of WebSocket data. This is excessive,
especially since we need to allocate a new buffer for the payload
in order to mask it anyway. Let's just allocate one buffer up front,
and send all the completed data at the end of the method
