Enum RelayoutScope 

#[repr(C)]
pub enum RelayoutScope {
    None = 0,
    IfcOnly = 1,
    SizingOnly = 2,
    Full = 3,
}

Fine-grained dirty classification for CSS property changes.

Inspired by Taffy’s binary dirty flag but extended to 4 levels for CSS-specific optimizations. Instead of “clean vs dirty”, we classify property changes by their actual layout impact, enabling the engine to skip unnecessary work.

Reference: Taffy (https://github.com/DioxusLabs/taffy) uses a binary dirty flag (clean/dirty). Our improvement: 4-level classification enables IFC-only reflow, sizing-only recomputation, and paint-only updates without full subtree relayout.

Variants

None = 0

No relayout needed — repaint only (e.g., color, background, opacity, transform). The node’s size and position are unchanged.

IfcOnly = 1

Only the IFC (Inline Formatting Context) containing this node needs re-shaping. Block-level siblings are unaffected unless the IFC height changes, in which case this auto-upgrades to SizingOnly.

SizingOnly = 2

This node’s sizing needs recomputation. Parent may need repositioning of subsequent siblings but doesn’t need full recursive relayout.

Full = 3

Full subtree relayout required (e.g., display, position, float change).

Trait Implementations

impl Clone for RelayoutScope

fn clone(&self) -> RelayoutScope

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RelayoutScope

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

Formats the value using the given formatter.

impl Default for RelayoutScope

fn default() -> Self

Returns the “default value” for a type.

impl Hash for RelayoutScope

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for RelayoutScope

fn cmp(&self, other: &RelayoutScope) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for RelayoutScope

fn eq(&self, other: &RelayoutScope) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for RelayoutScope

fn partial_cmp(&self, other: &RelayoutScope) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for RelayoutScope

impl Eq for RelayoutScope

impl StructuralPartialEq for RelayoutScope