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|
use iced_core::Color;
use lazy_static::lazy_static;
use palette::{FromColor, Hsl, Mix, RelativeContrast, Srgb};
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Palette {
background: Color,
text: Color,
primary: Color,
success: Color,
danger: Color,
}
impl Palette {
pub const LIGHT: Self = Self {
background: Color::WHITE,
text: Color::BLACK,
primary: Color::from_rgb(
0x5E as f32 / 255.0,
0x7C as f32 / 255.0,
0xE2 as f32 / 255.0,
),
success: Color::from_rgb(
0x12 as f32 / 255.0,
0x66 as f32 / 255.0,
0x4F as f32 / 255.0,
),
danger: Color::from_rgb(
0xC3 as f32 / 255.0,
0x42 as f32 / 255.0,
0x3F as f32 / 255.0,
),
};
pub const DARK: Self = Self {
background: Color::WHITE,
text: Color::BLACK,
primary: Color::from_rgb(
0x5E as f32 / 255.0,
0x7C as f32 / 255.0,
0xE2 as f32 / 255.0,
),
success: Color::from_rgb(
0x12 as f32 / 255.0,
0x66 as f32 / 255.0,
0x4F as f32 / 255.0,
),
danger: Color::from_rgb(
0xC3 as f32 / 255.0,
0x42 as f32 / 255.0,
0x3F as f32 / 255.0,
),
};
}
pub struct Extended {
pub background: Background,
pub primary: Group,
pub success: Group,
pub danger: Group,
}
lazy_static! {
pub static ref EXTENDED_LIGHT: Extended =
Extended::generate(Palette::LIGHT);
pub static ref EXTENDED_DARK: Extended = Extended::generate(Palette::DARK);
}
impl Extended {
pub fn generate(palette: Palette) -> Self {
Self {
background: Background::new(palette.background, palette.text),
primary: Group::new(
palette.primary,
palette.background,
palette.text,
),
success: Group::new(
palette.success,
palette.background,
palette.text,
),
danger: Group::new(
palette.danger,
palette.background,
palette.text,
),
}
}
}
pub struct Background {
pub base: Color,
pub weak: Color,
pub strong: Color,
pub text: Color,
}
impl Background {
pub fn new(base: Color, text: Color) -> Self {
Self {
base,
weak: muted(base, 0.1),
strong: muted(base, 0.2),
text,
}
}
}
pub struct Group {
pub base: Color,
pub weak: Color,
pub strong: Color,
pub text: Color,
}
impl Group {
pub fn new(base: Color, background: Color, text: Color) -> Self {
Self {
base,
weak: mix(base, background, 0.4),
strong: if is_dark(background) {
lighten(base, 0.1)
} else {
darken(base, 0.1)
},
text: if is_readable(base, text) {
text
} else if is_dark(text) {
Color::WHITE
} else {
Color::BLACK
},
}
}
}
fn muted(color: Color, amount: f32) -> Color {
let mut hsl = to_hsl(color);
hsl.lightness = if is_dark(color) {
let delta = amount * (1.0 - hsl.lightness).powi(7);
hsl.lightness + delta
} else {
let delta = amount * hsl.lightness.powi(5);
hsl.lightness - delta
};
from_hsl(hsl)
}
fn darken(color: Color, amount: f32) -> Color {
let mut hsl = to_hsl(color);
hsl.lightness = if hsl.lightness - amount < 0.0 {
0.0
} else {
hsl.lightness - amount
};
from_hsl(hsl)
}
fn mix(a: Color, b: Color, factor: f32) -> Color {
let a_lin = Srgb::from(a).into_linear();
let b_lin = Srgb::from(b).into_linear();
let mixed = a_lin.mix(&b_lin, factor);
Srgb::from_linear(mixed).into()
}
fn lighten(color: Color, amount: f32) -> Color {
let mut hsl = to_hsl(color);
hsl.lightness = if hsl.lightness + amount > 1.0 {
1.0
} else {
hsl.lightness + amount
};
from_hsl(hsl)
}
fn is_dark(color: Color) -> bool {
to_hsl(color).lightness < 0.5
}
fn is_readable(a: Color, b: Color) -> bool {
let a_srgb = Srgb::from(a);
let b_srgb = Srgb::from(b);
a_srgb.has_enhanced_contrast_text(&b_srgb)
}
fn to_hsl(color: Color) -> Hsl {
Hsl::from_color(Srgb::from(color))
}
fn from_hsl(hsl: Hsl) -> Color {
Srgb::from_color(hsl).into()
}
|
