Struct CacheMode 

struct CacheMode(u8);

The layout inputs that affect a node’s layout but are not part of the CacheKey: the SizingMode and whether each of the node’s vertical margins is collapsible, packed into a u8.

These are determined by the layout algorithm of the node’s parent and by the node’s own style, so they only change for a given node when one of those changes. Rather than keying every entry on them, a Cache records the single mode that all of its entries were computed with.

Tuple Fields

0: u8

Implementations

impl CacheMode

const INHERENT_SIZE_BIT: u8 = 0b001

Set if the sizing mode is SizingMode::InherentSize

const COLLAPSIBLE_START_MARGIN_BIT: u8 = 0b010

Set if the node’s top margin is collapsible

const COLLAPSIBLE_END_MARGIN_BIT: u8 = 0b100

Set if the node’s bottom margin is collapsible

const INITIAL: Self

The mode of a cache that has never been stored to. Which mode this is does not matter, as such a cache has no entries.

Trait Implementations

impl Clone for CacheMode

fn clone(&self) -> CacheMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CacheMode

impl Debug for CacheMode

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

Formats the value using the given formatter.

impl Eq for CacheMode

impl From<&LayoutInput> for CacheMode

fn from(input: &LayoutInput) -> Self

Converts to this type from the input type.

impl PartialEq for CacheMode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CacheMode