From 92c01da36016e94ff20163806ddcbcf7e33d4031 Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Sat, 10 Oct 2020 22:19:36 +0200
Subject: =?UTF-8?q?Switch=20back=20to=20custom=20geometry=20types,=20unifi?=
 =?UTF-8?q?ed=20with=20layout=20primitives=20=F0=9F=8F=9E?=
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---
 src/layout/fixed.rs | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 src/layout/fixed.rs

(limited to 'src/layout/fixed.rs')

diff --git a/src/layout/fixed.rs b/src/layout/fixed.rs
new file mode 100644
index 00000000..0d438879
--- /dev/null
+++ b/src/layout/fixed.rs
@@ -0,0 +1,42 @@
+use super::*;
+use crate::geom::Linear;
+
+/// A node that can fix its child's width and height.
+#[derive(Debug, Clone, PartialEq)]
+pub struct Fixed {
+    pub width: Option<Linear>,
+    pub height: Option<Linear>,
+    pub child: LayoutNode,
+}
+
+#[async_trait(?Send)]
+impl Layout for Fixed {
+    async fn layout(
+        &self,
+        ctx: &mut LayoutContext,
+        constraints: LayoutConstraints,
+    ) -> Vec<LayoutItem> {
+        let space = constraints.spaces[0];
+        let size = Size::new(
+            self.width
+                .map(|w| w.eval(space.base.width))
+                .unwrap_or(space.size.width),
+            self.height
+                .map(|h| h.eval(space.base.height))
+                .unwrap_or(space.size.height),
+        );
+
+        self.child
+            .layout(ctx, LayoutConstraints {
+                spaces: vec![LayoutSpace { base: size, size }],
+                repeat: false,
+            })
+            .await
+    }
+}
+
+impl From<Fixed> for LayoutNode {
+    fn from(fixed: Fixed) -> Self {
+        Self::dynamic(fixed)
+    }
+}
-- 
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