TextRunStyle

TextRunStyle is the low-level style object behind RichTextRun.

Most app authors do not need to construct it directly because builder methods like .size(...), .color(...), and .weight(...) on RichTextRun are easier to read. You reach for TextRunStyle directly when you want to prepare or reuse a text style value as data.

Example

use fission::core::ui::{RichTextRun, TextFontStyle, TextRunStyle};

let run = RichTextRun {
    text: "Important".into(),
    style: TextRunStyle {
        font_size: Some(16.0),
        color: Some(view.env.theme.tokens.colors.primary),
        underline: false,
        font_family: None,
        locale: None,
        font_weight: Some(700),
        font_style: TextFontStyle::Normal,
        line_height: None,
        letter_spacing: None,
        text_scale: None,
        background_color: None,
    },
    semantics_label: None,
    semantics_identifier: None,
    spell_out: None,
};

Field table

Field	Type	Meaning	Notes / default behavior
font_size	Option<f32>	Font size in layout points.	Falls back to theme body size when absent.
color	Option<IrColor>	Text color override.	Falls back to the theme's primary text color when absent.
underline	bool	Whether the run is underlined.	Defaults to false.
font_family	Option<String>	Font family override.	Defaults to None.
locale	Option<String>	Locale override used during shaping.	Defaults to None.
font_weight	Option<u16>	Font weight override.	Falls back to 400 when absent.
font_style	TextFontStyle	Normal or italic posture.	Defaults to Normal.
line_height	Option<f32>	Explicit line height.	Defaults to None.
letter_spacing	Option<f32>	Additional letter spacing.	Defaults to None.
text_scale	Option<f32>	Scale multiplier for the run.	Defaults to None, which behaves like 1.0.
background_color	Option<IrColor>	Background color behind the run.	Defaults to None.

Specific advice

TextRunStyle is a fully specified run style, not the cascading span style used inside nested rich-text trees. If you need inheritance-like behavior, build with rich-text spans instead of copying whole run styles around by hand.

Related

RichTextRun, RichText, TextFontStyle, and Text.