If a CSS animation or transition was being used to manipulate a property
that itself does not affect layout, we were still doing a full relayout
whenever any animation or transition related property was changed.
As it turns out, we can just not do that, and we avoid a bunch of
unnecessary layout work on many pages. When a layout-affecting property
is being animated, the animation/transition update code takes care to
invalidate layout as appropriate anyway!
This was very noticeable on GitHub, where moving the mouse cursor
between "Issues" and "Pull requests" would trigger a full relayout every
time. Now that doesn't happen, and it's much more responsive. :^)
Before this change, an element masked with 'mask-image: url(...)' would
show the mask, but 'mask: url(...)' would not. On e.g. dialogic.nl it
would show white boxes instead of the actual images in the top
navigation bar. We still do not support many of the other mask
properties, but with this change at least the masks show up in both
cases.
Before this change, we only parsed fit-content as a standalone keyword,
but CSS-SIZING-3 added it as a function as well. I don't know of
anything else in CSS that is overloaded like this, so it ends up looking
a little awkward in the implementation.
Note that a lot of code had already been prepped for fit-content values
to have an argument, we just weren't parsing it.
We've long claimed to support this, but then silently ignored string
values, until 4cb2063577 which would
not-so-silently crash instead. (Oops)
So, actually pass the string value along and use it in the list marker.
As part of this, rename our `list-style-type` enum to
`counter-style-name-keyword`. This is an awkward name, attempting to be
spec-based. (The spec says `<counter-style>`, which is either a
`<counter-style-name>` or a function, and the `<counter-style-name>` is
a `<custom-ident>` that also has a few predefined values. So this is the
best I could come up with.)
Unfortunately only one WPT test for this passes - the others fail
because we produce a different layout when text is in `::before` than
when it's in `::marker`, and similar issues.
Implemented by reusing AddMask display list item that was initially
added for `background-clip` property.
Progress on flashlight effect on https://null.com/games/athena-crisis
