style: Slim down SharedStyleContext, and do various other cleanups around the style crate.
This slims down SharedStyleContext, in preparation for a few things.
First, I would like to eventually move the stylist to the document in Servo, in
order for it to hold the StyleSheetSet.
Also, this gets rid of a fair amount of overhead while creating it in stylo.
Fixes bug 1363245.
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A specified position is now a struct made of two values of different types,
the first one being PositionComponent<X>, and the second one PositionComponent<Y>.
A position component is represented by the new enum PositionComponent<Side>,
with the three values Center, Length(LengthOrPercentage), and
Side(Side, Option<LengthOrPercentage>).
Side keywords are represented by the X and Y enums, which don't include a value
for the center keyword anymore. They are accompanied by the Side trait, which
allows us to determine whether a side keyword is "left" or "top".
This refactor simplified the parsing and serialisation code and exposed bugs in it,
where it would reject valid <position> values followed by arbitrary tokens,
and where it would fail to prefer "left" to "right" when serialising positions
in basic shapes.
bump required rayon version to 0.7
...and bring jpeg-decoder along for the ride. Minor tweaks were necessary because of rayon API changes.
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Stylo: Implement {specified|computed}::LayerImage.
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Bug 1359787 - Stylo: Unite the implementation of background-image/ mask-image and border-image-source in {background|svg|border}.mako.rs
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font-feature-settings gecko glue code
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FeatureTagValue value property changed to use u32. ToCss for
FeatureTagValue changed to allow conversion from u32 to string. Parse
for the same struct updated to convert from string to u32. Added two
functions to transfer settings to gecko and copy settings.
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FeatureTagValue value property changed to use u32. ToCss for
FeatureTagValue changed to allow conversion from u32 to string. Parse
for the same struct updated to convert from string to u32. Added two
functions to transfer settings to gecko and copy settings.
1. We add a new arm to TransitionProperty, TransitionProperty::Unsupported,
which contains an Atom, so it's better to remove the Copy trait from
TransitionProperty.
2. TransitionProperty::Unsupported(Atom) represents any non-animatable, custom,
or unrecognized property, and we use Atom to store the ident string for
serialization.
stylo: support all overflow values
overflow:clip doesn't exist, it's just called clip internally. Renamed, and added the other missing values.
I also removed the overflow newtype -- no need for extra code bloat, and it's not protecting us from much.
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Add calc method for CalcLengthOrPercentage
* Add calc method to calculate formula value with parent size
* Add unit test case
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Please see this issue: https://github.com/servo/servo/issues/15986
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* Add to_computed method to calculate `calc()` value with parent size,
if parent container size is `None`, the result will be `None`.
* Add from_option method for `MaybeAuto`, to construct from
`Option<Au>`.
* Update some test case.
Reset longhands of border-image to their initial value while parsing border shorthand
To do so, we need to declare the border-image longhands as part of border
shorthand and always reset them.
Spec link: https://drafts.csswg.org/css-backgrounds-3/#the-border-shorthands
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stylo: Add glue for contain property
In gecko, `size` and `content` values aren't implemented yet. So I had to disable these parts with mako. We will need to update the property and the glue once these are implemented in gecko.
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To do so, we need to declare the border-image longhands as part of border
shorthand and always reset them. This could fix couple stylo test failures.
See Gecko Bug 1357350 for the test update patches.
Spec link: https://drafts.csswg.org/css-backgrounds-3/#the-border-shorthands
Note that two unit tests have been fixed as well:
1. border_should_serialize_correctly
To verify the correctness of serialization of 'border' shorthand, we need
to reset 'border-image' as well.
2. same_longhands_should_serialize_correctly
Due to the same reason as above, since the 'border-image' is not reset,
the test expectation should be fixed.
If there are multiple prefixed/non-prefixed @keyframes with the same name;
* non-prefixed rule overrides earlier rules.
* prefixed rule overrides earlier prefixed rules.
