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 set_available_width(&mut self, width: f32)

Sets the width available to the view currently being measured.

pub fn available_width(&self) -> f32

Returns the width available to the view currently being measured.

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

Measures wrapped text with a custom line height.

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

Measures the longest unbreakable unit of text for the given wrap mode.

pub fn text_elide_lines_styled_spaced( &mut self, text: &str, size: f32, weight: FontWeight, width: f32, mode: WrapMode, spacing: f32, family: Option<&str>, style: FontStyle, line_height: LineHeight, max_lines: usize, ) -> String

Elides wrapped text to max_lines, returning the visible string.

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

Measures elided text with a custom line height.

pub fn text_line_height(size: f32) -> f32

Returns the line height used for a font size with the default factor.

pub fn text_line_height_with(size: f32, line_height: LineHeight) -> f32

Returns the line height used for a font size.

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

Returns the first baseline offset of a shaped single/wrapped line.

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.

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

Measures rich text spans with a custom line height.

pub fn rich_elide_lines( &mut self, spans: &[TextSpan], size: f32, width: f32, mode: WrapMode, spacing: f32, align: RichAlign, line_height: LineHeight, max_lines: usize, ) -> Vec<TextSpan>

Elides rich text to max_lines.

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

Returns the first baseline of shaped rich text.