Struct FontWeight 

pub struct FontWeight(/* private fields */);

Visual weight class of a font, typically on a scale from 1.0 to 1000.0.

The default value is FontWeight::NORMAL or 400.0.

In variable fonts, this can be controlled with the wght axis. This uses an f32 so that it can represent the full range of values possible with variable fonts.

See https://fonts.google.com/knowledge/glossary/weight.

In CSS, this corresponds to the font-weight property: https://www.w3.org/TR/css-fonts-4/#font-weight-prop.

Implementations

impl FontWeight

pub const THIN: FontWeight

Weight value of 100.

pub const EXTRA_LIGHT: FontWeight

Weight value of 200.

pub const LIGHT: FontWeight

Weight value of 300.

pub const SEMI_LIGHT: FontWeight

Weight value of 350.

pub const NORMAL: FontWeight

Weight value of 400. This is the default value.

pub const MEDIUM: FontWeight

Weight value of 500.

pub const SEMI_BOLD: FontWeight

Weight value of 600.

pub const BOLD: FontWeight

Weight value of 700.

pub const EXTRA_BOLD: FontWeight

Weight value of 800.

pub const BLACK: FontWeight

Weight value of 900.

pub const EXTRA_BLACK: FontWeight

Weight value of 950.

pub const fn new(weight: f32) -> FontWeight

Creates a new weight value.

pub const fn value(self) -> f32

Returns the underlying weight value.

pub fn parse_css(s: &str) -> Option<FontWeight>

Parses a CSS font-weight value.

Supported syntax (after trimming ASCII whitespace):

• normal → FontWeight::NORMAL
• bold → FontWeight::BOLD
• a number → FontWeight::new(value)

This parser is case-sensitive and does not clamp the numeric range.

use parlance::FontWeight;

assert_eq!(FontWeight::parse_css("normal"), Some(FontWeight::NORMAL));
assert_eq!(FontWeight::parse_css("bold"), Some(FontWeight::BOLD));
assert_eq!(FontWeight::parse_css("850"), Some(FontWeight::new(850.0)));
assert_eq!(FontWeight::parse_css("invalid"), None);

Trait Implementations

impl Clone for FontWeight

fn clone(&self) -> FontWeight

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FontWeight

impl Debug for FontWeight

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

Formats the value using the given formatter.

impl Default for FontWeight

fn default() -> FontWeight

Returns the “default value” for a type.

impl Display for FontWeight

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

Formats the value using the given formatter.

impl FromFontconfig for FontWeight

fn from_fontconfig(weight: i32) -> FontWeight

Creates a new weight attribute with the given value from Fontconfig.

The values are determined based on the fonts.conf documentation: https://www.freedesktop.org/software/fontconfig/fontconfig-user.html.

impl PartialEq for FontWeight

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for FontWeight

fn partial_cmp(&self, other: &FontWeight) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for FontWeight