From d4dd3606824e0d13812915b3d0907e5a436feb84 Mon Sep 17 00:00:00 2001
From: ConnorSkees <39542938+ConnorSkees@users.noreply.github.com>
Date: Sun, 16 Feb 2020 17:00:31 -0500
Subject: [PATCH] Handle number passed to invert()

---
 src/builtin/color/hsl.rs | 4 +++-
 tests/color.rs           | 8 ++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/builtin/color/hsl.rs b/src/builtin/color/hsl.rs
index ff30593..6613f59 100644
--- a/src/builtin/color/hsl.rs
+++ b/src/builtin/color/hsl.rs
@@ -150,11 +150,13 @@ pub(crate) fn register(f: &mut BTreeMap<String, Builtin>) {
     decl!(f "invert", |args, _| {
         max_args!(args, 2);
         let weight = match arg!(args, 1, "weight"=Value::Dimension(Number::from(100), Unit::Percent)) {
-            Value::Dimension(n, u) => bound!("amount", n, u, 0, 100) / Number::from(100),
+            Value::Dimension(n, u) => bound!("weight", n, u, 0, 100) / Number::from(100),
             v => return Err(format!("$weight: {} is not a number.", v).into()),
         };
         match arg!(args, 0, "color") {
             Value::Color(c) => Ok(Value::Color(c.invert(weight))),
+            Value::Dimension(n, Unit::Percent) => Ok(Value::Ident(format!("invert({}%)", n), QuoteKind::None)),
+            Value::Dimension(..) => return Err("Only one argument may be passed to the plain-CSS invert() function.".into()),
             v => return Err(format!("$color: {} is not a color.", v).into()),
         }
     });
diff --git a/tests/color.rs b/tests/color.rs
index cca2cc1..5cf3bf5 100644
--- a/tests/color.rs
+++ b/tests/color.rs
@@ -258,6 +258,14 @@ test!(
     "a {\n  color: invert(white);\n}\n",
     "a {\n  color: black;\n}\n"
 );
+test!(
+    invert_number,
+    "a {\n  color: invert(10%);\n}\n"
+);
+// test!(
+//     invert_number_casing,
+//     "a {\n  color: iNveRt(10%);\n}\n"
+// );
 test!(
     invert_weight_percent,
     "a {\n  color: invert(white, 20%);\n}\n",