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style: Always compute angle values to degrees.

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This matches the spec, https://drafts.csswg.org/css-values/#angles, which says:

> All <angle> units are compatible, and deg is their canonical unit.

And https://drafts.csswg.org/css-values/#compat, which says:

>When serializing computed values [...], compatible units [...] are converted into a single canonical unit.

And also other implementations (Blink always serializes angles as degrees in
computed style for example).

Also allows us to get rid of quite a bit of code, and makes computed angle value
representation just a number, which is nice.

Differential Revision: https://phabricator.services.mozilla.com/D8619
This commit is contained in:
Emilio Cobos Álvarez 2018-10-13 00:41:03 +00:00
parent 11fedf18d9
commit 42def5a011
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11 changed files with 142 additions and 209 deletions
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5
components/style/gecko/values.rs
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@ -325,10 +325,7 @@ impl GeckoStyleCoordConvertible for Angle {
fn from_gecko_style_coord<T: CoordData>(coord: &T) -> Option<Self> {
match coord.as_value() {
CoordDataValue::Degree(val) => Some(Angle::Deg(val)),
CoordDataValue::Grad(val) => Some(Angle::Grad(val)),
CoordDataValue::Radian(val) => Some(Angle::Rad(val)),
CoordDataValue::Turn(val) => Some(Angle::Turn(val)),
CoordDataValue::Degree(val) => Some(Angle::from_degrees(val)),
_ => None,
}
}