tree: update to latest version of wp_fractional_scale

src/scale.rs

@@ -0,0 +1,44 @@
+use std::fmt::{Debug, Display, Formatter};
+
+const BASE: u32 = 120;
+const BASEF: f64 = BASE as f64;
+
+#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[repr(transparent)]
+pub struct Scale(pub u32);
+
+impl Scale {
+    pub fn from_int(f: u32) -> Self {
+        Self(f.saturating_mul(BASE))
+    }
+
+    pub fn from_f64(f: f64) -> Self {
+        Self((f * BASEF).round() as u32)
+    }
+
+    pub fn to_f64(self) -> f64 {
+        self.0 as f64 / BASEF
+    }
+
+    pub fn round_up(self) -> u32 {
+        self.0.saturating_add(BASE - 1) / BASE
+    }
+}
+
+impl PartialEq<u32> for Scale {
+    fn eq(&self, other: &u32) -> bool {
+        self.0 == other * BASE
+    }
+}
+
+impl Debug for Scale {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        Debug::fmt(&self.to_f64(), f)
+    }
+}
+
+impl Display for Scale {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        Display::fmt(&self.to_f64(), f)
+    }
+}