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Diffstat (limited to 'src/font/variant.rs')
| -rw-r--r-- | src/font/variant.rs | 270 |
1 files changed, 0 insertions, 270 deletions
diff --git a/src/font/variant.rs b/src/font/variant.rs deleted file mode 100644 index d4508a59..00000000 --- a/src/font/variant.rs +++ /dev/null @@ -1,270 +0,0 @@ -use std::fmt::{self, Debug, Formatter}; - -use serde::{Deserialize, Serialize}; - -use crate::eval::{cast, Cast, IntoValue}; -use crate::geom::Ratio; - -/// Properties that distinguish a font from other fonts in the same family. -#[derive(Default, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)] -#[derive(Serialize, Deserialize)] -pub struct FontVariant { - /// The style of the font (normal / italic / oblique). - pub style: FontStyle, - /// How heavy the font is (100 - 900). - pub weight: FontWeight, - /// How condensed or expanded the font is (0.5 - 2.0). - pub stretch: FontStretch, -} - -impl FontVariant { - /// Create a variant from its three components. - pub fn new(style: FontStyle, weight: FontWeight, stretch: FontStretch) -> Self { - Self { style, weight, stretch } - } -} - -impl Debug for FontVariant { - fn fmt(&self, f: &mut Formatter) -> fmt::Result { - write!(f, "{:?}-{:?}-{:?}", self.style, self.weight, self.stretch) - } -} - -/// The style of a font. -#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)] -#[derive(Serialize, Deserialize, Cast)] -#[serde(rename_all = "kebab-case")] -pub enum FontStyle { - /// The default, typically upright style. - Normal, - /// A cursive style with custom letterform. - Italic, - /// Just a slanted version of the normal style. - Oblique, -} - -impl FontStyle { - /// The conceptual distance between the styles, expressed as a number. - pub fn distance(self, other: Self) -> u16 { - if self == other { - 0 - } else if self != Self::Normal && other != Self::Normal { - 1 - } else { - 2 - } - } -} - -impl Default for FontStyle { - fn default() -> Self { - Self::Normal - } -} - -/// The weight of a font. -#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)] -#[derive(Serialize, Deserialize)] -#[serde(transparent)] -pub struct FontWeight(u16); - -impl FontWeight { - /// Thin weight (100). - pub const THIN: Self = Self(100); - - /// Extra light weight (200). - pub const EXTRALIGHT: Self = Self(200); - - /// Light weight (300). - pub const LIGHT: Self = Self(300); - - /// Regular weight (400). - pub const REGULAR: Self = Self(400); - - /// Medium weight (500). - pub const MEDIUM: Self = Self(500); - - /// Semibold weight (600). - pub const SEMIBOLD: Self = Self(600); - - /// Bold weight (700). - pub const BOLD: Self = Self(700); - - /// Extrabold weight (800). - pub const EXTRABOLD: Self = Self(800); - - /// Black weight (900). - pub const BLACK: Self = Self(900); - - /// Create a font weight from a number between 100 and 900, clamping it if - /// necessary. - pub fn from_number(weight: u16) -> Self { - Self(weight.max(100).min(900)) - } - - /// The number between 100 and 900. - pub fn to_number(self) -> u16 { - self.0 - } - - /// Add (or remove) weight, saturating at the boundaries of 100 and 900. - pub fn thicken(self, delta: i16) -> Self { - Self((self.0 as i16).saturating_add(delta).max(100).min(900) as u16) - } - - /// The absolute number distance between this and another font weight. - pub fn distance(self, other: Self) -> u16 { - (self.0 as i16 - other.0 as i16).unsigned_abs() - } -} - -impl Default for FontWeight { - fn default() -> Self { - Self::REGULAR - } -} - -impl Debug for FontWeight { - fn fmt(&self, f: &mut Formatter) -> fmt::Result { - write!(f, "{}", self.0) - } -} - -cast! { - FontWeight, - self => IntoValue::into_value(match self { - FontWeight::THIN => "thin", - FontWeight::EXTRALIGHT => "extralight", - FontWeight::LIGHT => "light", - FontWeight::REGULAR => "regular", - FontWeight::MEDIUM => "medium", - FontWeight::SEMIBOLD => "semibold", - FontWeight::BOLD => "bold", - FontWeight::EXTRABOLD => "extrabold", - FontWeight::BLACK => "black", - _ => return self.to_number().into_value(), - }), - v: i64 => Self::from_number(v.clamp(0, u16::MAX as i64) as u16), - /// Thin weight (100). - "thin" => Self::THIN, - /// Extra light weight (200). - "extralight" => Self::EXTRALIGHT, - /// Light weight (300). - "light" => Self::LIGHT, - /// Regular weight (400). - "regular" => Self::REGULAR, - /// Medium weight (500). - "medium" => Self::MEDIUM, - /// Semibold weight (600). - "semibold" => Self::SEMIBOLD, - /// Bold weight (700). - "bold" => Self::BOLD, - /// Extrabold weight (800). - "extrabold" => Self::EXTRABOLD, - /// Black weight (900). - "black" => Self::BLACK, -} - -/// The width of a font. -#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)] -#[derive(Serialize, Deserialize)] -#[serde(transparent)] -pub struct FontStretch(u16); - -impl FontStretch { - /// Ultra-condensed stretch (50%). - pub const ULTRA_CONDENSED: Self = Self(500); - - /// Extra-condensed stretch weight (62.5%). - pub const EXTRA_CONDENSED: Self = Self(625); - - /// Condensed stretch (75%). - pub const CONDENSED: Self = Self(750); - - /// Semi-condensed stretch (87.5%). - pub const SEMI_CONDENSED: Self = Self(875); - - /// Normal stretch (100%). - pub const NORMAL: Self = Self(1000); - - /// Semi-expanded stretch (112.5%). - pub const SEMI_EXPANDED: Self = Self(1125); - - /// Expanded stretch (125%). - pub const EXPANDED: Self = Self(1250); - - /// Extra-expanded stretch (150%). - pub const EXTRA_EXPANDED: Self = Self(1500); - - /// Ultra-expanded stretch (200%). - pub const ULTRA_EXPANDED: Self = Self(2000); - - /// Create a font stretch from a ratio between 0.5 and 2.0, clamping it if - /// necessary. - pub fn from_ratio(ratio: Ratio) -> Self { - Self((ratio.get().max(0.5).min(2.0) * 1000.0) as u16) - } - - /// Create a font stretch from an OpenType-style number between 1 and 9, - /// clamping it if necessary. - pub fn from_number(stretch: u16) -> Self { - match stretch { - 0 | 1 => Self::ULTRA_CONDENSED, - 2 => Self::EXTRA_CONDENSED, - 3 => Self::CONDENSED, - 4 => Self::SEMI_CONDENSED, - 5 => Self::NORMAL, - 6 => Self::SEMI_EXPANDED, - 7 => Self::EXPANDED, - 8 => Self::EXTRA_EXPANDED, - _ => Self::ULTRA_EXPANDED, - } - } - - /// The ratio between 0.5 and 2.0 corresponding to this stretch. - pub fn to_ratio(self) -> Ratio { - Ratio::new(self.0 as f64 / 1000.0) - } - - /// The absolute ratio distance between this and another font stretch. - pub fn distance(self, other: Self) -> Ratio { - (self.to_ratio() - other.to_ratio()).abs() - } -} - -impl Default for FontStretch { - fn default() -> Self { - Self::NORMAL - } -} - -impl Debug for FontStretch { - fn fmt(&self, f: &mut Formatter) -> fmt::Result { - self.to_ratio().fmt(f) - } -} - -cast! { - FontStretch, - self => self.to_ratio().into_value(), - v: Ratio => Self::from_ratio(v), -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn test_font_weight_distance() { - let d = |a, b| FontWeight(a).distance(FontWeight(b)); - assert_eq!(d(500, 200), 300); - assert_eq!(d(500, 500), 0); - assert_eq!(d(500, 900), 400); - assert_eq!(d(10, 100), 90); - } - - #[test] - fn test_font_stretch_debug() { - assert_eq!(format!("{:?}", FontStretch::EXPANDED), "125%") - } -} |
