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53 lines
2 KiB
Rust
53 lines
2 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Computed types for CSS values that are related to transformations.
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use properties::animated_properties::Animatable;
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use values::computed::{Length, LengthOrPercentage, Number, Percentage};
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use values::generics::transform::TimingFunction as GenericTimingFunction;
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use values::generics::transform::TransformOrigin as GenericTransformOrigin;
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/// The computed value of a CSS `<transform-origin>`
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pub type TransformOrigin = GenericTransformOrigin<LengthOrPercentage, LengthOrPercentage, Length>;
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/// A computed timing function.
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pub type TimingFunction = GenericTimingFunction<u32, Number>;
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impl TransformOrigin {
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/// Returns the initial computed value for `transform-origin`.
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#[inline]
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pub fn initial_value() -> Self {
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Self::new(
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LengthOrPercentage::Percentage(Percentage(0.5)),
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LengthOrPercentage::Percentage(Percentage(0.5)),
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Length::from_px(0),
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)
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}
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}
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impl Animatable for TransformOrigin {
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#[inline]
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fn add_weighted(&self, other: &Self, self_portion: f64, other_portion: f64) -> Result<Self, ()> {
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Ok(Self::new(
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self.horizontal.add_weighted(&other.horizontal, self_portion, other_portion)?,
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self.vertical.add_weighted(&other.vertical, self_portion, other_portion)?,
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self.depth.add_weighted(&other.depth, self_portion, other_portion)?,
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))
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}
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#[inline]
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fn compute_distance(&self, other: &Self) -> Result<f64, ()> {
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self.compute_squared_distance(other).map(f64::sqrt)
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}
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#[inline]
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fn compute_squared_distance(&self, other: &Self) -> Result<f64, ()> {
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Ok(
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self.horizontal.compute_squared_distance(&other.horizontal)? +
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self.vertical.compute_squared_distance(&other.vertical)? +
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self.depth.compute_squared_distance(&other.depth)?
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)
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}
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}
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