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Make color helpers in palette module public

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Co-authored-by: Vincent Hanquez <vincent@coretype.io>
This commit is contained in:
Héctor Ramón Jiménez 2025-11-20 23:37:21 +01:00
parent 281e58da8e
commit 437a2826ea
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GPG key ID: 7CC46565708259A7
1 changed files with 23 additions and 10 deletions
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33
core/src/theme/palette.rs
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@ -625,7 +625,8 @@ struct Oklch {
a: f32,
}
fn darken(color: Color, amount: f32) -> Color {
/// Darkens a [`Color`] by the given factor.
pub fn darken(color: Color, amount: f32) -> Color {
let mut oklch = to_oklch(color);
// We try to bump the chroma a bit for more colorful palettes
@ -643,7 +644,8 @@ fn darken(color: Color, amount: f32) -> Color {
from_oklch(oklch)
}
fn lighten(color: Color, amount: f32) -> Color {
/// Lightens a [`Color`] by the given factor.
pub fn lighten(color: Color, amount: f32) -> Color {
let mut oklch = to_oklch(color);
// We try to bump the chroma a bit for more colorful palettes
@ -659,7 +661,9 @@ fn lighten(color: Color, amount: f32) -> Color {
from_oklch(oklch)
}
fn deviate(color: Color, amount: f32) -> Color {
/// Deviates a [`Color`] by the given factor. Lightens if the [`Color`] is
/// dark, darkens otherwise.
pub fn deviate(color: Color, amount: f32) -> Color {
if is_dark(color) {
lighten(color, amount)
} else {
@ -667,7 +671,8 @@ fn deviate(color: Color, amount: f32) -> Color {
}
}
fn mix(a: Color, b: Color, factor: f32) -> Color {
/// Mixes two colors by the given factor.
pub fn mix(a: Color, b: Color, factor: f32) -> Color {
let b_amount = factor.clamp(0.0, 1.0);
let a_amount = 1.0 - b_amount;
@ -682,7 +687,9 @@ fn mix(a: Color, b: Color, factor: f32) -> Color {
)
}
fn readable(background: Color, text: Color) -> Color {
/// Computes a [`Color`] from the given text color that is
/// readable on top of the given background color.
pub fn readable(background: Color, text: Color) -> Color {
if is_readable(background, text) {
return text;
}
@ -712,18 +719,24 @@ fn readable(background: Color, text: Color) -> Color {
}
}
fn is_dark(color: Color) -> bool {
/// Returns true if the [`Color`] is dark.
pub fn is_dark(color: Color) -> bool {
to_oklch(color).l < 0.6
}
fn is_readable(a: Color, b: Color) -> bool {
relative_contrast(a, b) >= 6.0
/// Returns true if text with the given [`Color`] is readable on top
/// of the given background [`Color`].
pub fn is_readable(background: Color, text: Color) -> bool {
relative_contrast(background, text) >= 6.0
}
// https://www.w3.org/TR/WCAG21/#dfn-contrast-ratio
fn relative_contrast(a: Color, b: Color) -> f32 {
/// Returns the [relative contrast ratio] of two colors.
///
/// [relative contrast ratio]: https://www.w3.org/TR/WCAG21/#dfn-contrast-ratio
pub fn relative_contrast(a: Color, b: Color) -> f32 {
let lum_a = a.relative_luminance();
let lum_b = b.relative_luminance();
(lum_a.max(lum_b) + 0.05) / (lum_a.min(lum_b) + 0.05)
}