Add WidgetExt and AsyncWidgetExt traits

examples/hello_world_widgets.rs

@@ -2,18 +2,19 @@ use std::convert::Infallible;
 
 use crossterm::event::Event;
 use crossterm::style::{ContentStyle, Stylize};
-use toss::widgets::{Border, BorderLook, Text};
+use toss::widgets::{BorderLook, Text};
-use toss::{Styled, Terminal, Widget};
+use toss::{Styled, Terminal, Widget, WidgetExt};
 
 fn widget() -> impl Widget<Infallible> {
-    Border::new(Text::new(
+    Text::new(
         Styled::new("Hello world!", ContentStyle::default().green())
             .then_plain("\n")
             .then(
                 "Press any key to exit",
                 ContentStyle::default().on_dark_blue(),
             ),
-    ))
+    )
+    .border()
     .look(BorderLook::LINE_DOUBLE)
     .style(ContentStyle::default().dark_red())
 }

src/widget.rs

@@ -1,5 +1,6 @@
 use async_trait::async_trait;
 
+use crate::widgets::{Border, Padding};
 use crate::{Frame, Size};
 
 // TODO Feature-gate these traits
@@ -26,3 +27,27 @@ pub trait AsyncWidget<E> {
 
     async fn draw(self, frame: &mut Frame) -> Result<(), E>;
 }
+
+pub trait WidgetExt: Sized {
+    fn border(self) -> Border<Self> {
+        Border::new(self)
+    }
+
+    fn padding(self) -> Padding<Self> {
+        Padding::new(self)
+    }
+}
+
+impl<W> WidgetExt for W {}
+
+pub trait AsyncWidgetExt: Sized {
+    fn border(self) -> Border<Self> {
+        Border::new(self)
+    }
+
+    fn padding(self) -> Padding<Self> {
+        Padding::new(self)
+    }
+}
+
+impl<W> AsyncWidgetExt for W {}