Trait ReplacedElement

Source

pub trait ReplacedElement: HtmlElement {
    // Required method
    fn intrinsic_sizing(&self) -> IntrinsicSizing;

    // Provided method
    fn notify_intrinsic_size_changed(&self) { ... }
}

Expand description

Shared behavior for replaced elements (img, video, canvas, iframe, svg).

Chrome equivalent: the virtual GetNaturalDimensions() on LayoutReplaced.

§Implementors

HtmlImageElement — intrinsic size from decoded image
HtmlVideoElement — intrinsic size from video dimensions
HtmlCanvasElement — intrinsic size from canvas width/height attributes

§How it connects to layout

During layout, DocumentLayoutView checks item_is_replaced on the Taffy style and reads intrinsic_sizing() for natural dimensions.

Required Methods§

Source

fn intrinsic_sizing(&self) -> IntrinsicSizing

Get the element’s intrinsic (natural) dimensions.

Chrome equivalent: LayoutReplaced::GetNaturalDimensions().

Returns the current intrinsic size. May change when the external resource loads (image decode complete, video metadata received).

Provided Methods§

Source

fn notify_intrinsic_size_changed(&self)

Notify that intrinsic dimensions have changed.

Chrome equivalent: LayoutReplaced::NaturalSizeChanged(). Called when the underlying resource changes size (e.g., image loaded, video resolution changed). Invalidates layout.