Expose transform_has_changed and use that instead

masonry/src/contexts.rs

@@ -236,6 +236,15 @@ impl MutateCtx<'_> {
             widget_children: self.widget_children.reborrow_mut(),
         }
     }
+
+    /// Whether the (local) transform of this widget has been modified since
+    /// the last time this widget's transformation was resolved.
+    ///
+    /// This is exposed for Xilem, and is more likely to change or be removed
+    /// in major releases of Masonry.
+    pub fn transform_has_changed(&self) -> bool {
+        self.widget_state.transform_changed
+    }
 }
 
 // --- MARK: WIDGET_REF ---

xilem/src/view/transform.rs

@@ -115,16 +115,14 @@ where
         ctx: &mut ViewCtx,
         mut element: xilem_core::Mut<'_, Self::Element>,
     ) {
-        let initial_transform = element.ctx.transform();
         self.child.rebuild(
             &prev.child,
             &mut view_state.child,
             ctx,
             element.reborrow_mut(),
         );
-        let transform_changed = element.ctx.transform() != initial_transform;
-        // We detect a child view changing the transform by comparing the
-        // resulting transform before and after the child view runs.
+        let transform_changed = element.ctx.transform_has_changed();
+        // If the child view changed the transform, we know we're out of date.
         if transform_changed {
             // If it has changed the transform, then we know that it will only be due to effects
             // "below us" (that is, it will have restarted from scratch).