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style: Remove Options from TransformOperation.

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This may or may not be part of the plan to get rid of nsCSSValue ;)

Option is not usable via FFI, and they should not be needed (we should be
following the shortest serialization principle instead). These patches also do
that, which matches the other transform properties. I think that slight change
is fine, if we can make it work, and consistent with other properties.

Alternative is adding more TransformOperation variants or such, which I rather
not do.

Differential Revision: https://phabricator.services.mozilla.com/D21862
This commit is contained in:
Emilio Cobos Álvarez 2019-03-03 11:31:54 +00:00
parent 1418ddc685
commit c16e88d229
6 changed files with 78 additions and 100 deletions
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40
components/style/values/generics/transform.rs
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@ -106,9 +106,18 @@ impl<H, V, D> TransformOrigin<H, V, D> {
}
}
fn is_same<N: PartialEq>(x: &N, y: &N) -> bool {
x == y
}
#[derive(Clone, Debug, MallocSizeOf, PartialEq, SpecifiedValueInfo, ToComputedValue, ToCss)]
/// A single operation in the list of a `transform` value
pub enum TransformOperation<Angle, Number, Length, Integer, LengthPercentage> {
pub enum TransformOperation<Angle, Number, Length, Integer, LengthPercentage>
where
Angle: Zero,
LengthPercentage: Zero,
Number: PartialEq,
{
/// Represents a 2D 2x3 matrix.
Matrix(Matrix<Number>),
/// Represents a 3D 4x4 matrix.
@ -119,7 +128,7 @@ pub enum TransformOperation<Angle, Number, Length, Integer, LengthPercentage> {
///
/// Syntax can be skew(angle) or skew(angle, angle)
#[css(comma, function)]
Skew(Angle, Option<Angle>),
Skew(Angle, #[css(skip_if = "Zero::is_zero")] Angle),
/// skewX(angle)
#[css(function = "skewX")]
SkewX(Angle),
@ -128,7 +137,7 @@ pub enum TransformOperation<Angle, Number, Length, Integer, LengthPercentage> {
SkewY(Angle),
/// translate(x, y) or translate(x)
#[css(comma, function)]
Translate(LengthPercentage, Option<LengthPercentage>),
Translate(LengthPercentage, #[css(skip_if = "Zero::is_zero")] LengthPercentage),
/// translateX(x)
#[css(function = "translateX")]
TranslateX(LengthPercentage),
@ -143,14 +152,9 @@ pub enum TransformOperation<Angle, Number, Length, Integer, LengthPercentage> {
Translate3D(LengthPercentage, LengthPercentage, Length),
/// A 2D scaling factor.
///
/// `scale(2)` is parsed as `Scale(Number::new(2.0), None)` and is equivalent to
/// writing `scale(2, 2)` (`Scale(Number::new(2.0), Some(Number::new(2.0)))`).
///
/// Negative values are allowed and flip the element.
///
/// Syntax can be scale(factor) or scale(factor, factor)
#[css(comma, function)]
Scale(Number, Option<Number>),
Scale(Number, #[css(contextual_skip_if = "is_same")] Number),
/// scaleX(factor)
#[css(function = "scaleX")]
ScaleX(Number),
@ -214,6 +218,10 @@ pub struct Transform<T>(#[css(if_empty = "none", iterable)] pub Vec<T>);
impl<Angle, Number, Length, Integer, LengthPercentage>
TransformOperation<Angle, Number, Length, Integer, LengthPercentage>
where
Angle: Zero,
LengthPercentage: Zero,
Number: PartialEq,
{
/// Check if it is any rotate function.
pub fn is_rotate(&self) -> bool {
@ -333,10 +341,10 @@ impl ToRadians for SpecifiedAngle {
impl<Angle, Number, Length, Integer, LoP> ToMatrix
for TransformOperation<Angle, Number, Length, Integer, LoP>
where
Angle: ToRadians + Copy,
Number: Copy + Into<f32> + Into<f64>,
Angle: Zero + ToRadians + Copy,
Number: PartialEq + Copy + Into<f32> + Into<f64>,
Length: ToAbsoluteLength,
LoP: ToAbsoluteLength,
LoP: Zero + ToAbsoluteLength,
{
#[inline]
fn is_3d(&self) -> bool {
@ -389,7 +397,7 @@ where
m.cast()
},
Scale3D(sx, sy, sz) => Transform3D::create_scale(sx.into(), sy.into(), sz.into()),
Scale(sx, sy) => Transform3D::create_scale(sx.into(), sy.unwrap_or(sx).into(), 1.),
Scale(sx, sy) => Transform3D::create_scale(sx.into(), sy.into(), 1.),
ScaleX(s) => Transform3D::create_scale(s.into(), 1., 1.),
ScaleY(s) => Transform3D::create_scale(1., s.into(), 1.),
ScaleZ(s) => Transform3D::create_scale(1., 1., s.into()),
@ -398,12 +406,12 @@ where
let ty = ty.to_pixel_length(reference_height)? as f64;
Transform3D::create_translation(tx, ty, tz.to_pixel_length(None)? as f64)
},
Translate(ref tx, Some(ref ty)) => {
Translate(ref tx, ref ty) => {
let tx = tx.to_pixel_length(reference_width)? as f64;
let ty = ty.to_pixel_length(reference_height)? as f64;
Transform3D::create_translation(tx, ty, 0.)
},
TranslateX(ref t) | Translate(ref t, None) => {
TranslateX(ref t) => {
let t = t.to_pixel_length(reference_width)? as f64;
Transform3D::create_translation(t, 0., 0.)
},
@ -416,7 +424,7 @@ where
},
Skew(theta_x, theta_y) => Transform3D::create_skew(
euclid::Angle::radians(theta_x.radians64()),
euclid::Angle::radians(theta_y.map_or(0., |a| a.radians64())),
euclid::Angle::radians(theta_y.radians64()),
),
SkewX(theta) => Transform3D::create_skew(
euclid::Angle::radians(theta.radians64()),