Struct layout_2020::replaced::NaturalSizes

pub(crate) struct NaturalSizes {
    pub width: Option<Au>,
    pub height: Option<Au>,
    pub ratio: Option<CSSFloat>,
}

The natural dimensions of a replaced element, including a height, width, and aspect ratio.

• Raster images always have an natural width and height, with 1 image pixel = 1px. The natural ratio should be based on dividing those. See https://github.com/w3c/csswg-drafts/issues/4572 for the case where either is zero. PNG specifically disallows this but I (SimonSapin) am not sure about other formats.

• Form controls have both natural width and height but no natural ratio. See https://github.com/w3c/csswg-drafts/issues/1044 and https://drafts.csswg.org/css-images/#natural-dimensions “In general, […]”

• For SVG, see https://svgwg.org/svg2-draft/coords.html#SizingSVGInCSS and again https://github.com/w3c/csswg-drafts/issues/4572.

• IFrames do not have natural width and height or natural ratio according to https://drafts.csswg.org/css-images/#intrinsic-dimensions.

Fields

width: Option<Au>

height: Option<Au>

ratio: Option<CSSFloat>

Implementations

impl NaturalSizes

pub(crate) fn from_width_and_height(width: f32, height: f32) -> Self

pub(crate) fn empty() -> Self

Trait Implementations

impl Debug for NaturalSizes

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Serialize for NaturalSizes

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.