Struct FontSpec 

pub struct FontSpec {
    pub family: Option<Arc<str>>,
    pub size: Option<FontSize>,
    pub weight: Option<u16>,
    pub style: Option<FontStyle>,
    pub color: Option<Rgba>,
}

Font specification: family name, size, weight, style, and color.

All fields are optional to support partial overlays – a FontSpec with only size set will only override the size when merged.

Default behavior asymmetry: During validation, family, size, weight, and color are required (missing values produce a validation error). style silently defaults to FontStyle::Normal because Normal is the universally-safe default – no theme ever intends to leave style undefined in a way that would produce incorrect rendering.

Fields

family: Option<Arc<str>>

Font family name (e.g., “Inter”, “Noto Sans”).

size: Option<FontSize>

Font size with explicit unit (points or pixels).

In TOML, set as size_pt (typographic points) or size_px (logical pixels). Converted to f32 logical pixels during validation via FontSize::to_logical_px(dpi).

weight: Option<u16>

CSS font weight (100–900).

style: Option<FontStyle>

Font style (normal, italic, oblique).

color: Option<Rgba>

Font color.

Implementations

impl FontSpec

pub fn merge(&mut self, overlay: &Self)

Merge an overlay into this value. Some fields in the overlay replace the corresponding fields in self; None fields are left unchanged. Nested structs are merged recursively.

pub fn is_empty(&self) -> bool

Returns true if all fields are at their default (None/empty) state.

Trait Implementations

impl Clone for FontSpec

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 FontSpec

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

Formats the value using the given formatter.

impl Default for FontSpec

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for FontSpec

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for FontSpec

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for FontSpec

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for FontSpec