Struct TextLinePrefixWidths 

pub struct TextLinePrefixWidths { /* private fields */ }

The width of every prefix of one line of text. It answers how wide any range of characters is without measuring again.

Implementations

impl TextLinePrefixWidths

pub fn from_parts( prefix_widths: Vec<f32>, separator_before: Vec<f32>, non_empty_overhang: f32, ) -> Option<Self>

Builds the table. prefix_widths holds the width of the first 0, 1, 2 and so on characters, so one more value than the line has characters. separator_before holds one value for each character: the part of the width before it that is dropped when a range starts at that character. A range of at least one character also gains non_empty_overhang, and a negative overhang counts as 0.0. Returns None when the lengths do not match or a value is not finite.

pub fn monospaced( char_count: usize, char_width: f32, letter_spacing: f32, ) -> Option<Self>

Builds a table for char_count characters of width char_width that each add letter_spacing. Negative values count as 0.0. Returns None when a value is not finite.

pub fn char_count(&self) -> usize

Number of characters the table covers.

pub fn width_for_char_range(&self, start: usize, end: usize) -> Option<f32>

Width of the characters from index start up to but not including end. Indices count characters, not bytes. Returns None when the range is reversed or ends past the line. An empty range has width 0.0.

Trait Implementations

impl Clone for TextLinePrefixWidths

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 TextLinePrefixWidths

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

Formats the value using the given formatter.

impl PartialEq for TextLinePrefixWidths

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TextLinePrefixWidths