CSS Fonts level 4 renames font-stretch to font-width, with font-stretch
being left as a legacy alias. Unfortunately the other specs have not yet
been updated, so both terms are used in different places.
It's possible to resolve box's height without doing inner layout, when
computed value is not auto. Doing that fixes height resolution, when box
with percentage height has containing block with percentage height.
Before:
- resolve used width
- layout box's content
- resolve height
After:
- resolve used width
- resolve height if treated as not auto
- layout box's content
- resolve height if treated as auto
When a property is a "legacy name alias", any time it is used in CSS or
via the CSSOM its aliased name is used instead.
(See https://drafts.csswg.org/css-cascade-5/#legacy-name-alias)
This means we only care about the alias when parsing a string as a
PropertyID - and we can just return the PropertyID it is an alias for.
No need for a distinct PropertyID for it, and no need for LibWeb to
care about it at all.
Previously, we had a bunch of these properties, which misused our code
for "logical aliases", some of which I've discovered were not even
fully implemented. But with this change, all that code can go away, and
making a legacy alias is just a case of putting it in the JSON. This
also shrinks `StyleProperties` as it doesn't need to contain data for
these aliases, and removes a whole load of `-webkit-*` spam from the
style inspector.
We now use the "report an exception" AO when a script has an execution
error. This has mostly replaced the older "report the exception" AO in
various specifications. Using this newer AO ensures that
`window.onerror` is invoked when a script has an execution error.
Rather than checking the avcodec version in CMake, check it using the
avcodec version macros in the only source file that needs to know about
the AVFrame API/ABI change in version 59.24.100. This is friendlier to
other build systems that would rather avoid configure time checks.
We are currently returning a JSON object of the form:
{
"name": "element-6066-11e4-a52e-4f735466cecf",
"value": "foo"
}
Instead, we are expected to return an object of the form:
{
"element-6066-11e4-a52e-4f735466cecf": "foo"
}
Very similar to commit e5877cda61.
By sending as much data as we can in a single write, we see a massive
performance improvement on WPT tests that hammer WebDriver with errors.
On my Linux machine, this reduces the runtime of:
/webdriver/tests/classic/perform_actions/invalid.py
from 45-60s down to 3-4s.
We must send a Cache-Control header, which then also requires that we
respond with an HTTP/1.1 response (the Pragma cache option is HTTP/1.0).
We should also send the Content-Type header using the same casing as is
written in the WebDriver spec (lowercase).
Both of these are explicitly tested by WPT.
Instead of creating a unique new prototype shape every time a function
object is instantiated, we now keep one cached with the intrinsics.
This avoids a whole lot of shape allocations, reducing GC pressure.
Instead of converting images to alpha masks on the CPU, we now delegate
that work to the GPU if possible, by way of SkSL shaders.
This noticeably speeds up https://vercel.com/ which has a ton of SVG
masking going on. The old implementation used 15% of CPU time when
loading the page, this one uses basically none.
I originally believed that this could never receive a null URL and the
spec was inaccurate, but it seems like it can indeed.
I don't have a distilled test, but this makes logging in with GitHub
work on https://v0.dev/
The spec allows us to either treat them as part of the UA origin, or as
its own origin before author styles. This second behaviour turns out to
be what we are currently doing, which is nice!
Funnily enough this was clarified in the spec barely a month after this
original comment was written. :^)
`revert` is supposed to revert to the previous cascade origin, but we
previously had it reverting to the previous layer. To support both,
track them separately during the cascade.
As part of this, we make `set_property_expanding_shorthands()` fall back
to `initial` if it can't find a previous value to revert to. Previously
we would just shrug and do nothing if that happened, which only works
if the value you want to revert to is whatever is currently in `style`.
That's no longer the case, because `revert` should skip over any layer
styles that have been applied since the previous origin.
It's difficult to know what we need to implement if we silently ignore
these endpoints. Let's log the endpoints and their parameters, and clean
up the wall of FIXME comments to be easier to grok.
WPT uses Python's http.client.HTTPConnection to send/receive WebDriver
messages. For some reason, on Linux, we see an ~0.04s delay between the
WPT server receiving the WebDriver response headers and its body. There
are tests which make north of 1100 of these requests, which adds up to
~44s.
These connections are almost always going to be over localhost and able
the be sent in a single write. So let's send the response all at once.
On my Linux machine, this reduces the runtime of /cookies/name/name.html
from 45-60s down to 3-4s.
If we don't recognize a given transition-property value as a known CSS
property (one that we know about, not necessarily an invalid one),
we should not extrapolate the other transition-foo values for it.
Fixes#1480
https://github.com/whatwg/console/pull/240 is an editorial change to use
the term "implementation-defined" more consistently. This seems to be
the only instance in the spec text which we quote verbatim.
This mainly uses forward declarations as appropriate for input element
related files. This reduces the number of targets being built when we
change HTMLInputElement.h from 430 to 44.
Previously, we would crash when attempting to establish a web socket
connection from inside a worker, as we were assuming that the ESO's
global object was a `Window`.
Previously, some otherwise unimplemented WebDriver endpoints were
indicating that they had executed successful, this was causing a large
number of Web Platform Tests to time out when they should have failed.
