Parse and prefix box-decoration-break property

Closes parcel-bundler#250

Author: devongovett

src/lib.rs

@@ -11352,6 +11352,44 @@ mod tests {
     );
   }
 
+  #[test]
+  fn test_break() {
+    prefix_test(
+      r#"
+      .foo {
+        box-decoration-break: clone;
+      }
+    "#,
+      indoc! {r#"
+      .foo {
+        -webkit-box-decoration-break: clone;
+        box-decoration-break: clone;
+      }
+    "#},
+      Browsers {
+        safari: Some(15 << 16),
+        ..Browsers::default()
+      },
+    );
+
+    prefix_test(
+      r#"
+      .foo {
+        box-decoration-break: clone;
+      }
+    "#,
+      indoc! {r#"
+      .foo {
+        box-decoration-break: clone;
+      }
+    "#},
+      Browsers {
+        firefox: Some(95 << 16),
+        ..Browsers::default()
+      },
+    );
+  }
+
   #[test]
   fn test_position() {
     test(

src/properties/mod.rs

@@ -1071,6 +1071,9 @@ define_properties! {
   "text-emphasis-position": TextEmphasisPosition(TextEmphasisPosition, VendorPrefix) / WebKit,
   "text-shadow": TextShadow(SmallVec<[TextShadow; 1]>),
 
+  // https://www.w3.org/TR/css-break-3/
+  "box-decoration-break": BoxDecorationBreak(BoxDecorationBreak, VendorPrefix) / WebKit,
+
   // https://www.w3.org/TR/2021/WD-css-ui-4-20210316
   "resize": Resize(Resize),
   "cursor": Cursor(Cursor<'i>),

src/properties/prefix_handler.rs

@@ -96,6 +96,7 @@ define_prefixes! {
   UserSelect,
   Appearance,
   ClipPath,
+  BoxDecorationBreak,
 }
 
 macro_rules! define_fallbacks {

src/properties/text.rs

@@ -909,6 +909,22 @@ impl<'i> Parse<'i> for TextEmphasisPosition {
   }
 }
 
+enum_property! {
+  /// A value for the [box-decoration-break](https://www.w3.org/TR/css-break-3/#break-decoration) property.
+  pub enum BoxDecorationBreak {
+    /// The element is rendered with no breaks present, and then sliced by the breaks afterward.
+    Slice,
+    /// Each box fragment is independently wrapped with the border, padding, and margin.
+    Clone,
+  }
+}
+
+impl Default for BoxDecorationBreak {
+  fn default() -> Self {
+    BoxDecorationBreak::Slice
+  }
+}
+
 impl ToCss for TextEmphasisPosition {
   fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
   where