Struct LineLayout

pub struct LineLayout {
    pub byte_offsets: Vec<usize>,
    pub advances: Vec<f32>,
}

Per-line byte offsets and cumulative advances (simple fontdue metrics).

Entries represent Unicode scalar boundaries rather than grapheme or shaped cluster boundaries. Consumers that need ligature-, bidi-, or grapheme-aware carets should use crate::LaidOutText and crate::caret_rect_at.

Examples

use ailloli_ui_text::LineLayout;
let layout = LineLayout { byte_offsets: vec![0, 1], advances: vec![0.0, 7.0] };
assert_eq!(layout.width(), 7.0);

Fields

byte_offsets: Vec<usize>

Cumulative advances in pixels after each UTF-8 boundary.

Invariant: byte_offsets.len() == advances.len() and byte_offsets[0] == 0.

advances: Vec<f32>

Cumulative logical-pixel advances corresponding one-for-one to byte_offsets.

Implementations

impl LineLayout

pub fn width(&self) -> f32

Returns the final cumulative advance in logical pixels, or zero if empty.

Examples

use ailloli_ui_text::LineLayout;
assert_eq!(LineLayout::default().width(), 0.0);
assert_eq!(LineLayout { byte_offsets: vec![0, 1], advances: vec![0.0, 8.5] }.width(), 8.5);

Trait Implementations

impl Clone for LineLayout

fn clone(&self) -> LineLayout

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LineLayout

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

Formats the value using the given formatter.

impl Default for LineLayout

fn default() -> LineLayout

Returns the “default value” for a type.

impl PartialEq for LineLayout

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for LineLayout