Struct MeasureMemo 

pub struct MeasureMemo {
    pub intrinsics: HashMap<u32, Intrinsics>,
    /* private fields */
}

The Rust-side memo taffy’s measure closure answers from. Keyed by layout node index; content_version bumps clear a leaf’s entries.

Fields

intrinsics: HashMap<u32, Intrinsics>

Implementations

impl MeasureMemo

pub fn width_key(width: f32) -> i64

pub fn clear(&mut self)

pub fn forget(&mut self, index: u32)

pub fn height_at(&self, index: u32, width: f32) -> Option<f32>

pub fn insert_height(&mut self, index: u32, width_key: i64, height: f32)

Remember the height at a width key (Self::width_key).

pub fn heights_of(&self, index: u32) -> &[(i64, f32)]

Every (width key, height) remembered for a leaf.

impl MeasureMemo

pub fn answer(&self, req: &MeasureRequest) -> (Size<f32>, bool, Option<f32>)

Answer from the memo. The second value says whether the HEIGHT was a guess (the max-content height at a narrower width), i.e. a second phase must ask the host for it; the third is the leaf’s first baseline (Intrinsics::baseline).

Trait Implementations

impl Clone for MeasureMemo

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MeasureMemo

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

Formats the value using the given formatter.

impl Default for MeasureMemo

fn default() -> Self

Returns the “default value” for a type.