diff options
Diffstat (limited to 'src/library')
| -rw-r--r-- | src/library/color.rs | 26 | ||||
| -rw-r--r-- | src/library/mod.rs | 28 |
2 files changed, 31 insertions, 23 deletions
diff --git a/src/library/color.rs b/src/library/color.rs new file mode 100644 index 00000000..eab84fd0 --- /dev/null +++ b/src/library/color.rs @@ -0,0 +1,26 @@ +use crate::color::RgbaColor; +use super::*; + +/// `rgb`: Create an RGB(A) color. +pub async fn rgb(span: Span, mut args: TableValue, _: LayoutContext<'_>) -> Pass<Value> { + let mut f = Feedback::new(); + + let color = RgbaColor::new( + clamp(args.expect::<Spanned<f64>>("red value", span, &mut f), &mut f), + clamp(args.expect::<Spanned<f64>>("green value", span, &mut f), &mut f), + clamp(args.expect::<Spanned<f64>>("blue value", span, &mut f), &mut f), + clamp(args.take::<Spanned<f64>>(), &mut f), + ); + + args.unexpected(&mut f); + Pass::new(Value::Color(color), f) +} + +fn clamp(component: Option<Spanned<f64>>, f: &mut Feedback) -> u8 { + component.map(|c| { + if c.v < 0.0 || c.v > 255.0 { + error!(@f, c.span, "should be between 0 and 255") + } + c.v.min(255.0).max(0.0).round() as u8 + }).unwrap_or_default() +} diff --git a/src/library/mod.rs b/src/library/mod.rs index eaab72fc..7d266eb5 100644 --- a/src/library/mod.rs +++ b/src/library/mod.rs @@ -2,12 +2,14 @@ mod align; mod boxed; +mod color; mod font; mod page; mod spacing; pub use align::*; pub use boxed::*; +pub use color::*; pub use font::*; pub use page::*; pub use spacing::*; @@ -18,10 +20,10 @@ use crate::compute::scope::Scope; use crate::prelude::*; macro_rules! std { - (fallback: $fallback:expr $(, $name:literal => $func:expr)* $(,)?) => { + ($($name:literal => $func:expr),* $(,)?) => { /// Create a scope with all standard library functions. pub fn _std() -> Scope { - let mut std = Scope::new(wrap!(val)); + let mut std = Scope::new(); $(std.insert($name, wrap!($func));)* std } @@ -35,32 +37,12 @@ macro_rules! wrap { } std! { - fallback: val, "align" => align, "box" => boxed, - "dump" => dump, "font" => font, "h" => h, "page" => page, "pagebreak" => pagebreak, + "rgb" => rgb, "v" => v, - "val" => val, -} - -/// `val`: Layouts its body flatly, ignoring other arguments. -/// -/// This is also the fallback function, which is used when a function name -/// cannot be resolved. -pub async fn val(_: Span, mut args: TableValue, _: LayoutContext<'_>) -> Pass<Value> { - let commands = match args.take::<SyntaxTree>() { - Some(tree) => vec![LayoutSyntaxTree(tree)], - None => vec![], - }; - - Pass::commands(commands, Feedback::new()) -} - -/// `dump`: Dumps its arguments into the document. -pub async fn dump(_: Span, args: TableValue, _: LayoutContext<'_>) -> Pass<Value> { - Pass::okay(Value::Table(args)) } |