summaryrefslogtreecommitdiff
path: root/src/layout/fixed.rs
diff options
context:
space:
mode:
Diffstat (limited to 'src/layout/fixed.rs')
-rw-r--r--src/layout/fixed.rs54
1 files changed, 26 insertions, 28 deletions
diff --git a/src/layout/fixed.rs b/src/layout/fixed.rs
index b7c58523..f0528643 100644
--- a/src/layout/fixed.rs
+++ b/src/layout/fixed.rs
@@ -22,63 +22,61 @@ impl Layout for FixedNode {
fn layout(
&self,
ctx: &mut LayoutContext,
- &Regions { current, base, expand, .. }: &Regions,
+ regions: &Regions,
) -> Vec<Constrained<Rc<Frame>>> {
// Fill in width or height if aspect ratio and the other is given.
let aspect = self.aspect.map(N64::into_inner);
let width = self.width.or(self.height.zip(aspect).map(|(h, a)| a * h));
let height = self.height.or(self.width.zip(aspect).map(|(w, a)| w / a));
+ // Resolve the linears based on the current width and height.
+ let mut child_size = Size::new(
+ width.map_or(regions.current.w, |w| w.resolve(regions.base.w)),
+ height.map_or(regions.current.h, |h| h.resolve(regions.base.h)),
+ );
+
+ // If width or height aren't set for an axis, the base should be
+ // inherited from the parent for that axis.
+ let child_base = Size::new(
+ if width.is_some() { child_size.w } else { regions.base.w },
+ if height.is_some() { child_size.h } else { regions.base.h },
+ );
+
// Prepare constraints.
- let mut constraints = Constraints::new(expand);
- constraints.set_base_if_linear(base, Spec::new(width, height));
+ let mut constraints = Constraints::new(regions.expand);
+ constraints.set_base_if_linear(regions.base, Spec::new(width, height));
// If the size for one axis isn't specified, the `current` size along
// that axis needs to remain the same for the result to be reusable.
if width.is_none() {
- constraints.exact.x = Some(current.w);
+ constraints.exact.x = Some(regions.current.w);
}
-
if height.is_none() {
- constraints.exact.y = Some(current.h);
+ constraints.exact.y = Some(regions.current.h);
}
- // Resolve the linears based on the current width and height.
- let mut size = Size::new(
- width.map_or(current.w, |w| w.resolve(base.w)),
- height.map_or(current.h, |h| h.resolve(base.h)),
- );
-
- // If width or height aren't set for an axis, the base should be
- // inherited from the parent for that axis.
- let base = Size::new(
- width.map_or(base.w, |_| size.w),
- height.map_or(base.h, |_| size.h),
- );
-
- // Handle the aspect ratio.
+ // Apply the aspect ratio.
if let Some(aspect) = aspect {
- constraints.exact = current.to_spec().map(Some);
+ let width = child_size.w.min(aspect * child_size.h);
+ child_size = Size::new(width, width / aspect);
+ constraints.exact = regions.current.to_spec().map(Some);
constraints.min = Spec::splat(None);
constraints.max = Spec::splat(None);
-
- let width = size.w.min(aspect * size.h);
- size = Size::new(width, width / aspect);
}
// If width or height are fixed, the child should fill the available
// space along that axis.
- let expand = Spec::new(width.is_some(), height.is_some());
+ let child_expand = Spec::new(width.is_some(), height.is_some());
// Layout the child.
- let mut regions = Regions::one(size, base, expand);
+ let mut regions = Regions::one(child_size, child_base, child_expand);
let mut frames = self.child.layout(ctx, &regions);
// If we have an aspect ratio and the child is content-sized, we need to
// relayout with expansion.
if let Some(aspect) = aspect {
if width.is_none() && height.is_none() {
- let needed = frames[0].item.size.cap(size);
+ let needed = frames[0].item.size.cap(child_size);
let width = needed.w.max(aspect * needed.h);
regions.current = Size::new(width, width / aspect);
regions.expand = Spec::splat(true);
@@ -87,8 +85,8 @@ impl Layout for FixedNode {
}
// Overwrite the child's constraints with ours.
- frames[0].constraints = constraints;
assert_eq!(frames.len(), 1);
+ frames[0].constraints = constraints;
frames
}