core, output: add Has, HasSize

output/src/space/measure.rs

@@ -3,13 +3,17 @@ use std::sync::{Arc, atomic::{AtomicUsize, Ordering::Relaxed}};
 
 pub trait HasSize<E: Output> {
     fn size (&self) -> &Measure<E>;
+    fn width (&self) -> usize {
+        self.size().w()
+    }
+    fn height (&self) -> usize {
+        self.size().w()
+    }
 }
 
-#[macro_export] macro_rules! has_size {
-    (<$E:ty>|$self:ident:$Struct:ident$(<$($L:lifetime),*$($T:ident$(:$U:path)?),*>)?|$cb:expr) => {
-        impl $(<$($L),*$($T $(: $U)?),*>)? HasSize<$E> for $Struct $(<$($L),*$($T),*>)? {
-            fn size (&$self) -> &Measure<$E> { $cb }
-        }
+impl<E: Output, T: Has<Measure<E>>> HasSize<E> for T {
+    fn size (&self) -> &Measure<E> {
+        self.get()
     }
 }