Add basic HRule and VRule widgets

src/ui/widgets/rules.rs

@@ -0,0 +1,36 @@
+use async_trait::async_trait;
+use toss::frame::{Frame, Pos, Size};
+
+use super::Widget;
+
+pub struct HRule;
+
+#[async_trait]
+impl Widget for HRule {
+    fn size(&self, _frame: &mut Frame, _max_width: Option<u16>, _max_height: Option<u16>) -> Size {
+        Size::new(0, 1)
+    }
+
+    async fn render(self: Box<Self>, frame: &mut Frame) {
+        let size = frame.size();
+        for x in 0..size.width as i32 {
+            frame.write(Pos::new(x, 0), "─");
+        }
+    }
+}
+
+pub struct VRule;
+
+#[async_trait]
+impl Widget for VRule {
+    fn size(&self, _frame: &mut Frame, _max_width: Option<u16>, _max_height: Option<u16>) -> Size {
+        Size::new(1, 0)
+    }
+
+    async fn render(self: Box<Self>, frame: &mut Frame) {
+        let size = frame.size();
+        for y in 0..size.height as i32 {
+            frame.write(Pos::new(0, y), "│");
+        }
+    }
+}