Struct Metrics 

pub struct Metrics {
    pub tab_width: usize,
}

Cell measurements a layout needs, so a caller that renders differently can say so instead of the layout assuming.

Fields

tab_width: usize

Cells between tab stops. A tab advances to the next multiple of this.

Implementations

impl Metrics

pub const DEFAULT_TAB_WIDTH: usize = 4

Cells between tab stops, absent a caller saying otherwise.

Public because a caller that draws the text this crate wrapped has to measure a tab the same way, and a second 4 written down beside this one agrees only by luck. Anything that expands or paints a tab should derive its stop from here rather than declare its own.

pub fn width_at(&self, cluster: &str, column: usize) -> usize

Cells cluster occupies when drawn starting at cell column.

Position-dependent, because a tab’s width is the distance to the next tab stop and nothing else. Measuring a tab as a fixed width — or, as unicode-width alone does, as zero — makes wrapping disagree with the renderer about where a row ends, and every column derived from either is then wrong by the difference.

Trait Implementations

impl Clone for Metrics

fn clone(&self) -> Metrics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Metrics

impl Debug for Metrics

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

Formats the value using the given formatter.

impl Default for Metrics

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Metrics

impl PartialEq for Metrics

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Metrics