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layout: Fix radius percentage resolution.

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By resolving against the corresponding dimension of the border box, instead of
against the width.

Fixes #16764
This commit is contained in:
Emilio Cobos Álvarez 2017-05-08 11:04:44 +02:00
parent 39471cda1b
commit c9ab75b013
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2 changed files with 20 additions and 8 deletions
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18
components/layout/model.rs
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@ -478,10 +478,22 @@ pub fn specified(length: LengthOrPercentage, containing_length: Au) -> Au {
}
}
pub fn specified_border_radius(radius: BorderRadiusSize, containing_length: Au) -> Size2D<Au> {
/// Computes a border radius size against the containing size.
///
/// Note that percentages in `border-radius` are resolved against the relevant
/// box dimension instead of only against the width per [1]:
///
/// > Percentages: Refer to corresponding dimension of the border box.
///
/// [1]: https://drafts.csswg.org/css-backgrounds-3/#border-radius
pub fn specified_border_radius(
radius: BorderRadiusSize,
containing_size: Size2D<Au>)
-> Size2D<Au>
{
let generics::BorderRadiusSize(size) = radius;
let w = specified(size.width, containing_length);
let h = specified(size.height, containing_length);
let w = specified(size.width, containing_size.width);
let h = specified(size.height, containing_size.height);
Size2D::new(w, h)
}