From https://bugzilla.mozilla.org/show_bug.cgi?id=1347719
This effectively combines the discriminants of the two enums and reduces the
size of PropertyDeclaration by one word.
MozReview-Commit-ID: 9rCRiSVZTQT
Now that cascade() gets a Device, we can use the default computed values from
there to avoid propagating that state all over the place.
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
As per the CSS Animations spec, in the case when multiple values for an
animation property are set, if the value length is less than the length
of animation-name property, then shortage values are filled up. Because
of this we need to know the length of animation-name proper before we
set other animation properties, so we need to cascade animation-name property
earlier than other animation properties.
We do the same thing for transition-property.
Make text decoration testable and do not serialize initial text-decoration-style
Servo now uses the same name for the text-decoration-line longhand property as Gecko. This was done to enable testing of the text-decoration shorthand.
The text-decoration shorthand has been fixed to not serialize initial text-decoration-style.
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Shorthand cannot represent CSS-wide keyword in individual longhands, and
thus we cannot serialize longhand with CSS-wide keyword as part of a
shorthand.
Update cssparser to 0.11
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<s>Depends on https://github.com/servo/rust-cssparser/pull/122.</s>
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style: Adjust float if the element is positioned per CSS 2.1 section 9.7
We've found crashes related to this in Gecko.
r? @simonsapin or @heycam
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Fixes#15398
The previous commit did most of the work here of updating the algorithm
to skip shorthands if a shorthand value was an empty string. This commit
just updates animations LonghandToSerialize's implementation of
to_css_declared to write an empty string value if the list lengths
differ (and updates the test to match).
possible shorthands matches the linked spec.
Previously substep 5 attempted to serialize the complete shorthand
declaration and substep 6 skipped to the next shorthand only if the
current shorthand was not serialized, but this did not catch empty
serializations. The spec on the other hand specifically says that the
*value* should be evaluated first and if the value is empty substep 6
should skip to the next shorthand - which is what happens now.
To do this required some refactoring which mostly simplifies the code.
Specifically:
- append_declaration_value was refactored so that importance is not
required as a arg (by moving it to the end of append_serialization)
and is_overflow_with_name was removed as an arg also (initially I
refactored it elsewhere, but it turns out it's no longer required at
all - more below). With these changes, append_declaration_value can
be used within the algorithm for to_css to obtain just the value for
substep 5.
- Substeps 7 and 8 of the algorithm become explicit (they were implicit
before) by passing the value, shorthand and importance to
append_serialization.
- serialize_shorthand_to_buffer is no longer required (as the algorithm
serializes the value first instead, as per the spec.
A surprising result of this was that I could also remove a lot of code
handling the special case of the overflow properties serialization. This
is because the overflow's LonghandToCss implementation of
to_css_declared already does the right thing according to the spec - it
writes the single value if both overflow-x and -y are equal, and
writes nothing otherwise - so that the algorithm now skips that shorthand
instead rendering the longhands.
