We have three different enums to represent slightly different things. Reuse them
properly, and kill some code in the animated_properties module while at it.
MozReview-Commit-ID: 5ZAly8f4lWy
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
We need another flag that represents allow-negative-number for SMIL, so
this enum will also comprise the another parsing mode that allows negative number.
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.
To simplify adding additional data to `ParserContext`, this moves test usages to
a few shared locations, instead of being spread across many tests.
MozReview-Commit-ID: 1OahV797eq
fixed the wrong behavior of border-spacing
fixed the wrong behavior of border-spacing
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Font feature settings
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Implement parsing/serialization for font-feature-settings
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Fix radial gradient's <size>/<ending-shape> parsing
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Parsing now handles sizes and shapes in various order.
I had to delete `EndingShape`'s parse implementation and mix it with `Position` in `parse_radial`. It became a bit complicated to read but I couldn't make it simpler.
r? @Manishearth
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