/
color_hwb.rs
201 lines (187 loc) · 7.21 KB
/
color_hwb.rs
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use swc_atoms::js_word;
use swc_css_ast::{
AbsoluteColorBase, AlphaValue, Angle, ComponentValue, Delimiter, DelimiterValue, Hue, Ident,
Number, Percentage,
};
use swc_css_utils::{angle_to_deg, hwb_to_rgb, to_rgb255};
use crate::compiler::Compiler;
impl Compiler {
fn get_hue(&self, hue: Option<&ComponentValue>) -> Option<f64> {
match hue {
Some(ComponentValue::Hue(box hue)) => {
let mut value = match hue {
Hue::Number(Number { value, .. }) => *value,
Hue::Angle(Angle {
value: Number { value, .. },
unit: Ident { value: unit, .. },
..
}) => angle_to_deg(*value, unit),
};
value %= 360.0;
if value < 0.0 {
value += 360.0;
}
Some(value)
}
Some(ComponentValue::Ident(box Ident { value, .. }))
if value.eq_ignore_ascii_case(&js_word!("none")) =>
{
Some(0.0)
}
_ => None,
}
}
fn get_percentage(&self, percentage: Option<&ComponentValue>) -> Option<f64> {
match percentage {
Some(ComponentValue::Percentage(box Percentage {
value: Number { value, .. },
..
})) => {
if *value > 100.0 {
return Some(1.0);
} else if *value < 0.0 {
return Some(0.0);
}
Some(*value / 100.0)
}
Some(ComponentValue::Ident(box Ident { value, .. }))
if value.eq_ignore_ascii_case(&js_word!("none")) =>
{
Some(0.0)
}
_ => None,
}
}
fn get_alpha_value(&self, alpha_value: Option<&ComponentValue>) -> Option<f64> {
match alpha_value {
Some(ComponentValue::AlphaValue(box AlphaValue::Number(Number { value, .. }))) => {
if *value > 1.0 {
return Some(1.0);
} else if *value < 0.0 {
return Some(0.0);
}
Some(*value)
}
Some(ComponentValue::AlphaValue(box AlphaValue::Percentage(Percentage {
value: Number { value, .. },
..
}))) => {
if *value > 100.0 {
return Some(1.0);
} else if *value < 0.0 {
return Some(0.0);
}
Some(*value / 100.0)
}
Some(ComponentValue::Ident(box Ident { value, .. }))
if value.eq_ignore_ascii_case(&js_word!("none")) =>
{
Some(0.0)
}
None => Some(1.0),
_ => None,
}
}
pub(crate) fn process_color_hwb(&mut self, n: &mut AbsoluteColorBase) {
if let AbsoluteColorBase::Function(function) = n {
if function.name.value != js_word!("hwb") {
return;
}
let h = match self.get_hue(function.value.get(0)) {
Some(value) => value,
_ => return,
};
let w = match self.get_percentage(function.value.get(1)) {
Some(value) => value,
_ => return,
};
let b = match self.get_percentage(function.value.get(2)) {
Some(value) => value,
_ => return,
};
let a = match self.get_alpha_value(function.value.get(4)) {
Some(value) => value,
_ => return,
};
let rgb = to_rgb255(hwb_to_rgb([h, w, b]));
if a == 1.0 {
*n = AbsoluteColorBase::Function(swc_css_ast::Function {
name: Ident {
value: js_word!("rgb"),
span: Default::default(),
raw: None,
},
value: vec![
ComponentValue::Number(Box::new(Number {
value: rgb[0].round(),
span: Default::default(),
raw: None,
})),
ComponentValue::Delimiter(box Delimiter {
value: DelimiterValue::Comma,
span: Default::default(),
}),
ComponentValue::Number(Box::new(Number {
value: rgb[1].round(),
span: Default::default(),
raw: None,
})),
ComponentValue::Delimiter(box Delimiter {
value: DelimiterValue::Comma,
span: Default::default(),
}),
ComponentValue::Number(Box::new(Number {
value: rgb[2].round(),
span: Default::default(),
raw: None,
})),
],
span: Default::default(),
});
} else {
*n = AbsoluteColorBase::Function(swc_css_ast::Function {
name: Ident {
value: js_word!("rgba"),
span: Default::default(),
raw: None,
},
value: vec![
ComponentValue::Number(Box::new(Number {
value: rgb[0].round(),
span: Default::default(),
raw: None,
})),
ComponentValue::Delimiter(box Delimiter {
value: DelimiterValue::Comma,
span: Default::default(),
}),
ComponentValue::Number(Box::new(Number {
value: rgb[1].round(),
span: Default::default(),
raw: None,
})),
ComponentValue::Delimiter(box Delimiter {
value: DelimiterValue::Comma,
span: Default::default(),
}),
ComponentValue::Number(Box::new(Number {
value: rgb[2].round(),
span: Default::default(),
raw: None,
})),
ComponentValue::Delimiter(box Delimiter {
value: DelimiterValue::Comma,
span: Default::default(),
}),
ComponentValue::AlphaValue(box AlphaValue::Number(Number {
value: a,
span: Default::default(),
raw: None,
})),
],
span: Default::default(),
});
}
}
}
}