We don't need all this specific logic for parsing the `transition`
property - we also now maintain `none` as such until use time which
gains us a couple extra tests
Since we now have access to the `AbstractElement` through the
`ComputationContext` we can just set the flag that this element relies
on tree counting functions directly, no need to pass this struct around.
There are some non-math functions (such as tree counting functions)
which we should allow within `calc()`s . This commit implements the
initial infrastructure for this.
We don't yet parse any of these non-math functions in
`parse_a_calculation` so there is no functional change.
Adds support for `sibling-index()` and `sibling-count()` when parsing
`<number>` and `<integer>`. This is achieved by a new
`TreeCountingFunctionStyleValue` class which is converted within
`absolutized` to `NumberStyleValue` and `IntegerStyleValue` respectively
There are still a few kinks to work out in order to support these
everywhere, namely:
- There are some `StyleValue`s which aren't absolutized (i.e. those
which are stored within another `StyleValue` without an
`absolutize()` method.
- We don't have a way to represent this new `StyleValue` within
`{Number,Integer}OrCalculated`. This would be fixed if we were to
instead just use the `StyleValue` classes until style computation at
which time they would be absolutized into their respective
primitives (double, i64, etc) bypassing the need for *OrCalculated
entirely.
Some contexts (e.g. descriptors, media conditions) don't allow tree
counting functions, this commit adds an easy way to check if the current
value context is one of those.
We no longer rely on parsing easing functions before keywords so this
can be moved down with the other parse_for_type calls.
`parse_for_type` is used for more than just parsing easing functions so
the variable name `maybe_easing_function` was misleading
This excludes `step-end` and `step-start` which are expected to be
converted to the equivalent function at parse time.
We are expected to serialize these as the explicit keywords - previously
we would parse as `EasingStyleValue` and serialize equivalent functions
as the keywords. This caused issues as we would incorrectly serialize
even explicit functions as the keyword.
This also allows us to move the magic easing functions to
`EasingFunction` rather than `EasingStyleValue` which is a bit tidier
Previously we were doing this ad-hoc later in the process but we now
have the `calc` clamping system which can simplify things.
This reveals some false-positives in that we don't handle relative
lengths within these `calc`s but these are fixed in the next commit
Before this change we would maintain explicit signs when serializing
e.g. `animation-iteration-count: calc(+1)` would serialize as `calc(+1)`
rather than `calc(1)` as intended
Canonicalization can require information that is only known after
compute time (i.e. resolved relative lengths within calcs).
This also allows us to get rid of the `had_explicit_input` flag and just
rely on whether Optional has a value
The `transform` property is now parsed based on its JSON data, and
shouldn't behave any differently than before.
This makes `<transform-list>` and `<transform-function>` work in the
`syntax` descriptor for `@property`, and also means we know that
`transform` can accept the `none` keyword. We get a few WPT passes out
of that.
We have this code duplicated in multiple places, and we'll want to
handle registered custom properties too at some point, so wrap it in a
reusable `CalculationContext::for_property()` method.
Noticed while doing this that ValueParsingContext will eventually need
to take a PropertyNameAndID, not a PropertyID, so I've added a FIXME.
Typed-OM means that the author can set a property's value to a
CSSUnparsedValue, which may or may not have any arbitrary substitution
functions in it. This VERIFY was just there to catch parsing bugs that
created UnresolvedStyleValues unnecessarily, and removing it is
harmless.
Previously we would always use the window's viewport which was incorrect
if we were within an iframe.
This is likely applicable to all uses of
`Length::ResolutionContext::for_window`.
property_accepts_type() only looks at the property itself, not any
longhands it might have, so we thought that `font` didn't accept
`<custom-ident>`s, and seeing "-apple-..." makes us throw out the
declaration even though it's valid as a font name.
We'll reject these like any other unrecognized value if it's somewhere
that's not supported, so this was really just an optimization for a
rare edge case, and removing the check doesn't have any observable
effect except fixing this bug and any similar cases.
Changing property_accepts_type() to look at longhands is not
straightforward, as not all longhand values are valid in the shorthand.
This applies size, inline-size, and style containment in some cases.
There are other WPT tests for that, but we seem to not implement enough
of containment for this to have an effect so I've not imported those.
Gets us 35 WPT subtests.
