Struct SpanStyle 

pub struct SpanStyle {

    pub color: Option<Color>,
    pub brush: Option<Brush>,
    pub alpha: Option<f32>,
    pub font_size: TextUnit,
    pub font_weight: Option<FontWeight>,
    pub font_style: Option<FontStyle>,
    pub font_synthesis: Option<FontSynthesis>,
    pub font_family: Option<FontFamily>,
    pub font_feature_settings: Option<FontFeatureSettings>,
    pub letter_spacing: TextUnit,
    pub baseline_shift: Option<BaselineShift>,
    pub text_geometric_transform: Option<TextGeometricTransform>,
    pub locale_list: Option<LocaleList>,
    pub background: Option<Color>,
    pub text_decoration: Option<TextDecoration>,
    pub shadow: Option<Shadow>,
    pub platform_style: Option<PlatformSpanStyle>,
    pub draw_style: Option<TextDrawStyle>,
}

Style of a span of characters: color, font, spacing and decoration. Compose’s SpanStyle. A field left unset (None or Unspecified) keeps the inherited value when styles merge.

Fields

color: Option<Color>

Text color.

brush: Option<Brush>

Brush that paints the glyphs, for example a gradient. Merging a style that sets color clears an inherited brush, and the reverse.

alpha: Option<f32>

Opacity from 0.0 to 1.0, multiplied into the color or brush. None leaves it unchanged.

font_size: TextUnit

Font size in Sp or as a multiple of the default size with Em.

font_weight: Option<FontWeight>

Weight of the font.

font_style: Option<FontStyle>

Upright or italic glyphs.

font_synthesis: Option<FontSynthesis>

Which missing bold or italic faces may be faked. None allows both.

font_family: Option<FontFamily>

Font family.

font_feature_settings: Option<FontFeatureSettings>

OpenType feature settings in CSS font-feature-settings syntax, such as smcp, liga 0.

letter_spacing: TextUnit

Extra space added after each character, in Sp or as a multiple of the font size.

baseline_shift: Option<BaselineShift>

Vertical shift of the glyphs from the baseline.

text_geometric_transform: Option<TextGeometricTransform>

Horizontal scale and skew of the glyphs. Text rendering does not apply it yet.

locale_list: Option<LocaleList>

Languages of the text, which select language-specific glyph forms and hyphenation rules.

background: Option<Color>

Color drawn behind the glyphs.

text_decoration: Option<TextDecoration>

Underline and line through.

shadow: Option<Shadow>

Shadow drawn behind the glyphs.

platform_style: Option<PlatformSpanStyle>

Platform-specific settings.

draw_style: Option<TextDrawStyle>

Fill or stroke. None fills the glyphs.

Implementations

impl SpanStyle

pub fn merge(&self, other: &Self) -> Self

Returns a style where each field set in other replaces the one in self. Fields unset in other keep the value of self.

pub fn plus(&self, other: &Self) -> Self

Same as SpanStyle::merge. Compose’s SpanStyle.plus.

pub fn resolve_font_size(&self, default_size: f32) -> f32

Returns the font size in sp. An Sp size is used as is, an Em size multiplies default_size, and an unspecified, non-positive or non-finite size gives default_size. A default_size that is not positive and finite counts as 14.0.

pub fn resolve_foreground_color(&self, default_color: Color) -> Color

Returns color, else the color of a solid brush, else default_color, with alpha multiplied into the result’s alpha channel.

pub fn render_hash(&self) -> u64

Hash of every field that changes how the text looks, as renderers use it to key caches.

Trait Implementations

impl Clone for SpanStyle

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SpanStyle

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SpanStyle

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for SpanStyle

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SpanStyle