Struct LineLayout 

pub struct LineLayout {
    pub font_size: Pixels,
    pub width: Pixels,
    pub ascent: Pixels,
    pub descent: Pixels,
    pub runs: Vec<ShapedRun>,
    pub len: usize,
}

A laid out and styled line of text

Fields

font_size: Pixels

The font size for this line

width: Pixels

The width of the line

ascent: Pixels

The ascent of the line

descent: Pixels

The descent of the line

runs: Vec<ShapedRun>

The shaped runs that make up this line

len: usize

The length of the line in utf-8 bytes

Implementations

impl LineLayout

pub fn paint( &self, origin: Point<Pixels>, line_height: Pixels, align: TextAlign, align_width: Option<Pixels>, decoration_runs: &[DecorationRun], window: &mut Window, cx: &mut App, ) -> Result<()>

Paint this layout to the window, using the given decoration runs to color glyphs and draw underlines and strikethroughs.

This is a lower-level alternative to ShapedLine::paint for callers that hold a bare layout and track decorations themselves.

pub fn paint_background( &self, origin: Point<Pixels>, line_height: Pixels, align: TextAlign, align_width: Option<Pixels>, decoration_runs: &[DecorationRun], window: &mut Window, cx: &mut App, ) -> Result<()>

Paint the background of this layout to the window, using the given decoration runs to determine background colors.

This is a lower-level alternative to ShapedLine::paint_background for callers that hold a bare layout and track decorations themselves.

impl LineLayout

pub fn index_for_x(&self, x: Pixels) -> Option<usize>

The index for the character at the given x coordinate

pub fn closest_index_for_x(&self, x: Pixels) -> usize

closest_index_for_x returns the character boundary closest to the given x coordinate (e.g. to handle aligning up/down arrow keys)

pub fn x_for_index(&self, index: usize) -> Pixels

The x position of the character at the given index

pub fn font_id_for_index(&self, index: usize) -> Option<FontId>

The corresponding Font at the given index

pub fn split_at(&self, byte_index: usize) -> (LineLayout, LineLayout)

Split this layout at a byte index, returning (prefix, suffix).

• prefix contains glyphs for bytes [0, byte_index) with original positions. Its width equals the x-advance up to the split point.
• suffix contains glyphs for bytes [byte_index, len) with positions shifted left so the first glyph starts at x=0, and byte indices rebased to 0.
• font_size, ascent, and descent are copied to both halves.

Trait Implementations

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.