Constrain offered boxes with independent widget size bounds

tests/cases/deferred.rs

@@ -84,7 +84,7 @@ fn request_edits_in_a_nested_child_reach_the_allocator() {
     let inner = (a,).span(Dir::RIGHT).add(&mut h.rsc);
     let tail = rect(Color::BLUE).add(&mut h.rsc);
     h.set_root((inner, tail).span(Dir::RIGHT));
-    h.rsc.ui_mut().widgets.get_mut(&a).unwrap().x = Some(Len::px(40.0));
+    h.rsc.widgets_mut().set_max_len(a, Axis::X, Len::px(40.0));
     h.frame();
     assert_corners!(h, a, (0, 0), (40, 100));
     assert_corners!(h, tail, (40, 0), (300, 100));
@@ -109,7 +109,7 @@ fn adding_a_bound_to_a_previously_unbounded_share_reallocates_the_row() {
         h.frame();
         h.rsc
             .widgets_mut()
-            .set_size_rule(id, Axis::X, SizeRule::Max(Len::px(80.0)));
+            .set_size_rule(id, Axis::X, SizeRule::max(Len::px(80.0)));
         h.frame();
         assert_corners!(h, id, (0, 0), (80, 100));
         assert_corners!(h, b, (80, 0), (400, 100));
@@ -209,7 +209,7 @@ fn bounds_also_apply_to_shares_discovered_by_drawing() {
     let a = h.rsc.widgets_mut().add_strong(Unhinted);
     h.rsc
         .widgets_mut()
-        .set_size_rule(a.id(), Axis::X, SizeRule::Max(Len::px(80.0)));
+        .set_size_rule(a.id(), Axis::X, SizeRule::max(Len::px(80.0)));
     let id = a.id();
     let b = rect(Color::BLUE).add_strong(&mut h.rsc);
     let b_id = b.id();
@@ -245,7 +245,7 @@ fn a_measured_nested_share_keeps_its_comparison_for_the_outer_span() {
     let a_id = a.id();
     h.rsc
         .widgets_mut()
-        .set_size_rule(a_id, Axis::X, SizeRule::Max(Len::px(80.0)));
+        .set_size_rule(a_id, Axis::X, SizeRule::max(Len::px(80.0)));
     let b = rect(Color::BLUE).add_strong(&mut h.rsc);
     let b_id = b.id();
     let inner = h.rsc.widgets_mut().add_strong(Span {
@@ -289,14 +289,11 @@ fn relative_bounds_on_a_hinted_child_track_the_offer_before_its_declared_size()
         let id = natural.id();
         h.rsc
             .widgets_mut()
-            .set_size_rule(id, Axis::X, SizeRule::Max(Len::rel(0.75)));
+            .set_size_rule(id, Axis::X, SizeRule::max(Len::rel(0.75)));
         h.rsc.widgets_mut().set_size_rule(
             id,
             Axis::Y,
-            SizeRule::Clamp {
-                min: Len::rel(0.25),
-                max: Len::rel(0.75),
-            },
+            SizeRule::clamp(Len::rel(0.25), Len::rel(0.75)),
         );
         let inner = h.rsc.widgets_mut().add_strong(Stack {
             children: vec![natural],
@@ -313,10 +310,7 @@ fn relative_bounds_on_a_hinted_child_track_the_offer_before_its_declared_size()
         h.rsc.widgets_mut().set_size_rule(
             bounded.id(),
             Axis::X,
-            SizeRule::Clamp {
-                min: Len::rel(0.25),
-                max: Len::rel(0.75),
-            },
+            SizeRule::clamp(Len::rel(0.25), Len::rel(0.75)),
         );
         let fixed = wtext("one line, overflowing whatever it is given")
             .size(16)
@@ -389,3 +383,18 @@ fn moving_scroll_content_preserves_its_resolved_expression_size() {
     h.frame();
     assert_corners!(h, leaf_id, (0, 240), (300, 360));
 }
+
+#[test]
+fn an_intrinsic_share_cap_uses_the_allocators_fractional_base() {
+    let mut h = Harness::new((300, 100));
+    let head = rect(Color::BLUE).width(30).add(&mut h.rsc);
+    let bounded = rect(Color::RED).max_width(Len::rel(0.25)).add(&mut h.rsc);
+    let tail = rect(Color::GREEN).add(&mut h.rsc);
+    h.set_root((head, bounded, tail).span(Dir::RIGHT));
+    assert_corners!(h, bounded, (30, 0), (105, 100));
+    assert_corners!(h, tail, (105, 0), (300, 100));
+    h.resize((400, 100));
+    h.frame();
+    assert_corners!(h, bounded, (30, 0), (130, 100));
+    assert_corners!(h, tail, (130, 0), (400, 100));
+}