Struct LineLayout 

pub struct LineLayout {
    pub char_range: (usize, usize),
    pub y: f32,
    pub height: f32,
    pub boundary_chars: Vec<usize>,
    pub boundary_x: Vec<f32>,
}

One line’s geometry within a TextLayoutSnapshot. TextInput (single-line) always has exactly one; TextArea (Step 4) will have one per wrapped visual line — the shape already supports that, so Step 4 needs no snapshot redesign.

Fields

char_range: (usize, usize)

Char range [start, end) this line’s text spans (end exclusive of any line-break character).

y: f32

Top y and height, WORLD-SPACE (matching EditableDecl::rect) — so engine dispatch can query directly against raw click coordinates with no translation.

height: f32

boundary_chars: Vec<usize>

Absolute char index of every grapheme boundary in this line, ascending, paired 1:1 with boundary_x.

boundary_x: Vec<f32>

World-space x of each boundary in boundary_chars.

Implementations

impl LineLayout

pub fn x_at(&self, target: usize) -> f32

World-space x of target within this line — clamped to the line’s own char_range first, so an index from a multi-line selection or a Span that extends past this line’s end/start still resolves to a sane on-screen position (this line’s own right/left edge) instead of panicking or guessing.

Trait Implementations

impl Clone for LineLayout

fn clone(&self) -> LineLayout

Returns a duplicate 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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LineLayout