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Implement #[animate(fallback)] for #[derive(Animate)]

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This allows us to derive the Animate trait, providing a fallback function
for when the 2 values aren't similar.
This commit is contained in:
Anthony Ramine 2017-08-26 16:25:28 +02:00
parent 3751fe9fdc
commit 4a4bf89575
7 changed files with 99 additions and 121 deletions
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100
components/style/properties/helpers/animated_properties.mako.rs
View file

@ -812,73 +812,6 @@ impl Animate for CalcLengthOrPercentage {
}
}
/// https://drafts.csswg.org/css-transitions/#animtype-lpcalc
impl Animate for LengthOrPercentage {
#[inline]
fn animate(&self, other: &Self, procedure: Procedure) -> Result<Self, ()> {
match (self, other) {
(
&LengthOrPercentage::Length(ref this),
&LengthOrPercentage::Length(ref other),
) => {
Ok(LengthOrPercentage::Length(this.animate(other, procedure)?))
},
(
&LengthOrPercentage::Percentage(ref this),
&LengthOrPercentage::Percentage(ref other),
) => {
Ok(LengthOrPercentage::Percentage(this.animate(other, procedure)?))
},
(this, other) => {
// Special handling for zero values since these should not require calc().
if this.is_definitely_zero() {
return other.to_animated_zero()?.animate(other, procedure);
}
if other.is_definitely_zero() {
return this.animate(&this.to_animated_zero()?, procedure);
}
let this = CalcLengthOrPercentage::from(*this);
let other = CalcLengthOrPercentage::from(*other);
Ok(LengthOrPercentage::Calc(this.animate(&other, procedure)?))
}
}
}
}
/// https://drafts.csswg.org/css-transitions/#animtype-lpcalc
impl Animate for LengthOrPercentageOrAuto {
#[inline]
fn animate(&self, other: &Self, procedure: Procedure) -> Result<Self, ()> {
match (self, other) {
(
&LengthOrPercentageOrAuto::Length(ref this),
&LengthOrPercentageOrAuto::Length(ref other),
) => {
Ok(LengthOrPercentageOrAuto::Length(this.animate(other, procedure)?))
},
(
&LengthOrPercentageOrAuto::Percentage(ref this),
&LengthOrPercentageOrAuto::Percentage(ref other),
) => {
Ok(LengthOrPercentageOrAuto::Percentage(
this.animate(other, procedure)?,
))
},
(&LengthOrPercentageOrAuto::Auto, &LengthOrPercentageOrAuto::Auto) => {
Ok(LengthOrPercentageOrAuto::Auto)
},
(this, other) => {
let this: Option<CalcLengthOrPercentage> = From::from(*this);
let other: Option<CalcLengthOrPercentage> = From::from(*other);
Ok(LengthOrPercentageOrAuto::Calc(
this.animate(&other, procedure)?.ok_or(())?,
))
},
}
}
}
impl ToAnimatedZero for LengthOrPercentageOrAuto {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> {
@ -893,39 +826,6 @@ impl ToAnimatedZero for LengthOrPercentageOrAuto {
}
}
/// https://drafts.csswg.org/css-transitions/#animtype-lpcalc
impl Animate for LengthOrPercentageOrNone {
#[inline]
fn animate(&self, other: &Self, procedure: Procedure) -> Result<Self, ()> {
match (self, other) {
(
&LengthOrPercentageOrNone::Length(ref this),
&LengthOrPercentageOrNone::Length(ref other),
) => {
Ok(LengthOrPercentageOrNone::Length(this.animate(other, procedure)?))
},
(
&LengthOrPercentageOrNone::Percentage(ref this),
&LengthOrPercentageOrNone::Percentage(ref other),
) => {
Ok(LengthOrPercentageOrNone::Percentage(
this.animate(other, procedure)?,
))
}
(&LengthOrPercentageOrNone::None, &LengthOrPercentageOrNone::None) => {
Ok(LengthOrPercentageOrNone::None)
},
(this, other) => {
let this = <Option<CalcLengthOrPercentage>>::from(*this);
let other = <Option<CalcLengthOrPercentage>>::from(*other);
Ok(LengthOrPercentageOrNone::Calc(
this.animate(&other, procedure)?.ok_or(())?,
))
},
}
}
}
impl ToAnimatedZero for LengthOrPercentageOrNone {
#[inline]
fn to_animated_zero(&self) -> Result<Self, ()> {