Struct LayoutCtx 

pub struct LayoutCtx<'a> { /* private fields */ }

Borrowed text system used by layout code to shape and measure text.

Measurements are not cached here; the underlying TextSystem owns any caching that may occur.

Implementations

impl<'a> LayoutCtx<'a>

pub fn new(text: &'a mut TextSystem, default_font_size: f32) -> LayoutCtx<'a>

Creates a context that borrows text and uses default_font_size for callers that do not specify a size.

pub fn default_font_size(&self) -> f32

Returns the default font size for this layout pass.

pub fn text_width(&mut self, text: &str, size: f32) -> f32

Measures the width of a single line of text.

pub fn text_width_weighted( &mut self, text: &str, size: f32, weight: FontWeight, ) -> f32

Measures the width of a single line using the given font weight.

pub fn text_width_spaced(&mut self, text: &str, size: f32, spacing: f32) -> f32

Measures the width of a single line with letter spacing.

pub fn text_width_weighted_spaced( &mut self, text: &str, size: f32, weight: FontWeight, spacing: f32, ) -> f32

Measures the width of a single line with weight and letter spacing.

pub fn text_width_styled_spaced( &mut self, text: &str, size: f32, weight: FontWeight, spacing: f32, family: Option<&str>, style: FontStyle, ) -> f32

Measures the width of a single line with weight, spacing, family, and style.

pub fn caret_positions( &mut self, text: &str, size: f32, weight: FontWeight, ) -> Vec<f32>

Returns caret positions along a single line of text.

pub fn caret_positions_spaced( &mut self, text: &str, size: f32, weight: FontWeight, spacing: f32, ) -> Vec<f32>

Returns caret positions along a single line with letter spacing.

pub fn text_wrapped_size( &mut self, text: &str, size: f32, weight: FontWeight, width: f32, mode: WrapMode, ) -> Size

Measures wrapped text within width, returning its size.

pub fn text_wrapped_size_spaced( &mut self, text: &str, size: f32, weight: FontWeight, width: f32, mode: WrapMode, spacing: f32, ) -> Size

Measures wrapped text within width with letter spacing.

pub fn text_wrapped_size_styled_spaced( &mut self, text: &str, size: f32, weight: FontWeight, width: f32, mode: WrapMode, spacing: f32, family: Option<&str>, style: FontStyle, ) -> Size

Measures wrapped text with weight, spacing, family, and style.

pub fn text_elided_size( &mut self, text: &str, size: f32, weight: FontWeight, max_width: f32, mode: ElideMode, ) -> Size

Measures text elided to max_width with the given elision mode.

pub fn text_elided_size_spaced( &mut self, text: &str, size: f32, weight: FontWeight, max_width: f32, mode: ElideMode, spacing: f32, ) -> Size

Measures elided text with letter spacing.

pub fn text_elided_size_styled_spaced( &mut self, text: &str, size: f32, weight: FontWeight, max_width: f32, mode: ElideMode, spacing: f32, family: Option<&str>, style: FontStyle, ) -> Size

Measures elided text with weight, spacing, family, and style.

pub fn text_line_height(size: f32) -> f32

Returns the line height used for a font size.

pub fn rich_size( &mut self, spans: &[TextSpan], size: f32, width: f32, mode: WrapMode, spacing: f32, align: RichAlign, ) -> Size

Measures rich text spans, returning their shaped size.