Struct ParagraphMetricsCache

pub struct ParagraphMetricsCache { /* private fields */ }

Per-engine paragraph metrics cache.

Metrics are indexed by the same geometry key as layouts. Aggregate metadata is absent until a visible-layout build completes.

Examples

use ailloli_ui_editor::layout::ParagraphMetricsCache;
let cache = ParagraphMetricsCache::default();
assert!(cache.metadata().is_none());

Implementations

impl ParagraphMetricsCache

Resolves, updates, and invalidates paragraph metrics.

pub fn metadata(&self) -> Option<&ParagraphMetricsMetadata>

Returns aggregate metadata from the last completed layout build.

Returns None before the first build and after Self::clear.

Examples

use ailloli_ui_editor::layout::ParagraphMetricsCache;
assert!(ParagraphMetricsCache::default().metadata().is_none());

pub fn clear(&mut self)

Removes all per-paragraph metrics and aggregate metadata.

Examples

use ailloli_ui_editor::layout::ParagraphMetricsCache;
let mut cache = ParagraphMetricsCache::default();
cache.clear();
assert!(cache.metadata().is_none());

Trait Implementations

impl Clone for ParagraphMetricsCache

fn clone(&self) -> ParagraphMetricsCache

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ParagraphMetricsCache

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

Formats the value using the given formatter.

impl Default for ParagraphMetricsCache

fn default() -> ParagraphMetricsCache

Returns the “default value” for a type.