Move around library types 🚚

1 files changed, 62 insertions, 0 deletions

diff --git a/src/library/base.rs b/src/library/base.rs
new file mode 100644
index 00000000..3d067faa
--- /dev/null
+++ b/src/library/base.rs
@@ -0,0 +1,62 @@
+use crate::color::{Color, RgbaColor};
+use crate::pretty::pretty;
+
+use super::*;
+
+/// `repr`: Get the string representation of a value.
+///
+/// # Positional arguments
+/// - Any value.
+///
+/// # Return value
+/// The string representation of the value.
+pub fn repr(ctx: &mut EvalContext, args: &mut ValueArgs) -> Value {
+    match args.require::<Value>(ctx, "value") {
+        Some(value) => pretty(&value).into(),
+        None => Value::Error,
+    }
+}
+
+/// `rgb`: Create an RGB(A) color.
+///
+/// # Positional arguments
+/// - Red component:   of type `float`, between 0.0 and 1.0.
+/// - Green component: of type `float`, between 0.0 and 1.0.
+/// - Blue component:  of type `float`, between 0.0 and 1.0.
+/// - Alpha component: optional, of type `float`, between 0.0 and 1.0.
+pub fn rgb(ctx: &mut EvalContext, args: &mut ValueArgs) -> Value {
+    let r = args.require(ctx, "red component");
+    let g = args.require(ctx, "green component");
+    let b = args.require(ctx, "blue component");
+    let a = args.find(ctx);
+
+    let mut clamp = |component: Option<Spanned<f64>>, default| {
+        component.map_or(default, |c| {
+            if c.v < 0.0 || c.v > 1.0 {
+                ctx.diag(warning!(c.span, "should be between 0.0 and 1.0"));
+            }
+            (c.v.max(0.0).min(1.0) * 255.0).round() as u8
+        })
+    };
+
+    Value::Color(Color::Rgba(RgbaColor::new(
+        clamp(r, 0),
+        clamp(g, 0),
+        clamp(b, 0),
+        clamp(a, 255),
+    )))
+}
+
+/// `type`: Find out the name of a value's type.
+///
+/// # Positional arguments
+/// - Any value.
+///
+/// # Return value
+/// The name of the value's type as a string.
+pub fn type_(ctx: &mut EvalContext, args: &mut ValueArgs) -> Value {
+    match args.require::<Value>(ctx, "value") {
+        Some(value) => value.type_name().into(),
+        None => Value::Error,
+    }
+}