fix(geometry): serialize DOMMatrix numbers like ECMAScript

Source-commit: 715995c959

Cargo.lock

@@ -2567,6 +2567,7 @@ dependencies = [
 name = "moli-geometry"
 version = "0.1.0"
 dependencies = [
+ "dragonbox_ecma",
  "moli-css-parse",
 ]
 

moli-geometry/Cargo.toml

@@ -5,6 +5,7 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+dragonbox_ecma = "0.1.12"
 moli-css-parse = { path = "../moli-css-parse" }
 
 [lints]

moli-geometry/src/lib.rs

@@ -17,6 +17,25 @@ mod tests {
         );
     }
 
+    #[test]
+    fn dom_matrix_text_uses_ecmascript_number_serialization() {
+        for (value, expected) in [
+            (1.0 / 300_000_000.0, "3.3333333333333334e-9"),
+            (f64::MAX, "1.7976931348623157e+308"),
+            (f64::MIN_POSITIVE * f64::EPSILON, "5e-324"),
+        ] {
+            let matrix = DomMatrixComponents {
+                m42: value,
+                ..DomMatrixComponents::identity()
+            };
+
+            assert_eq!(
+                matrix.dom_matrix_text().unwrap(),
+                format!("matrix(1, 0, 0, 1, 0, {expected})")
+            );
+        }
+    }
+
     #[test]
     fn parses_css_transform_list_into_product_matrix() {
         let matrix = parse_dom_matrix_value("translateX(10px) scale(2) rotate(90deg)").unwrap();

moli-geometry/src/matrix.rs

@@ -498,6 +498,14 @@ impl DomMatrixComponents {
     }
 
     pub fn css_text(self) -> Option<String> {
+        self.text(css_number)
+    }
+
+    pub fn dom_matrix_text(self) -> Option<String> {
+        self.text(ecmascript_number)
+    }
+
+    fn text(self, serialize_number: fn(f64) -> String) -> Option<String> {
         if self.is_2d() {
             let values = [self.m11, self.m12, self.m21, self.m22, self.m41, self.m42];
             if !values.iter().all(|value| value.is_finite()) {
@@ -505,12 +513,12 @@ impl DomMatrixComponents {
             }
             return Some(format!(
                 "matrix({}, {}, {}, {}, {}, {})",
-                css_number(self.m11),
-                css_number(self.m12),
-                css_number(self.m21),
-                css_number(self.m22),
-                css_number(self.m41),
-                css_number(self.m42)
+                serialize_number(self.m11),
+                serialize_number(self.m12),
+                serialize_number(self.m21),
+                serialize_number(self.m22),
+                serialize_number(self.m41),
+                serialize_number(self.m42)
             ));
         }
 
@@ -523,26 +531,32 @@ impl DomMatrixComponents {
         }
         Some(format!(
             "matrix3d({}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {}, {})",
-            css_number(self.m11),
-            css_number(self.m12),
-            css_number(self.m13),
-            css_number(self.m14),
-            css_number(self.m21),
-            css_number(self.m22),
-            css_number(self.m23),
-            css_number(self.m24),
-            css_number(self.m31),
-            css_number(self.m32),
-            css_number(self.m33),
-            css_number(self.m34),
-            css_number(self.m41),
-            css_number(self.m42),
-            css_number(self.m43),
-            css_number(self.m44)
+            serialize_number(self.m11),
+            serialize_number(self.m12),
+            serialize_number(self.m13),
+            serialize_number(self.m14),
+            serialize_number(self.m21),
+            serialize_number(self.m22),
+            serialize_number(self.m23),
+            serialize_number(self.m24),
+            serialize_number(self.m31),
+            serialize_number(self.m32),
+            serialize_number(self.m33),
+            serialize_number(self.m34),
+            serialize_number(self.m41),
+            serialize_number(self.m42),
+            serialize_number(self.m43),
+            serialize_number(self.m44)
         ))
     }
 }
 
+fn ecmascript_number(value: f64) -> String {
+    dragonbox_ecma::Buffer::new()
+        .format_finite(value)
+        .to_owned()
+}
+
 fn css_number(value: f64) -> String {
     if value == 0.0 {
         "0".to_owned()

moli-renderer-v8/src/context_bootstrap/geometry_runtime.rs

@@ -1966,7 +1966,7 @@ fn dom_matrix_css_text<'s>(
     scope: &mut v8::PinScope<'s, '_>,
     object: v8::Local<'s, v8::Object>,
 ) -> Option<String> {
-    let Some(css_text) = dom_matrix_components(scope, object).css_text() else {
+    let Some(css_text) = dom_matrix_components(scope, object).dom_matrix_text() else {
         throw_dom_exception(
             scope,
             "InvalidStateError",