Add color option to Layer

src/views/layer.rs

@@ -1,3 +1,4 @@
+use crate::theme::ColorStyle;
 use crate::view::{View, ViewWrapper};
 use crate::Printer;
 
@@ -9,12 +10,28 @@ use crate::Printer;
 #[derive(Debug)]
 pub struct Layer<T: View> {
     view: T,
+    color: ColorStyle,
 }
 
 impl<T: View> Layer<T> {
     /// Wraps the given view.
     pub fn new(view: T) -> Self {
-        Layer { view }
+        Self::with_color(view, ColorStyle::primary())
+    }
+
+    /// Wraps the given view with a custom background color.
+    pub fn with_color(view: T, color: ColorStyle) -> Self {
+        Layer { view, color }
+    }
+
+    /// Gets the current color.
+    pub fn color(&self) -> ColorStyle {
+        self.color
+    }
+
+    /// Sets the background color.
+    pub fn set_color(&mut self, color: ColorStyle) {
+        self.color = color;
     }
 
     inner_getters!(self.view: T);
@@ -24,9 +41,11 @@ impl<T: View> ViewWrapper for Layer<T> {
     wrap_impl!(self.view: T);
 
     fn wrap_draw(&self, printer: &Printer<'_, '_>) {
-        for y in 0..printer.size.y {
-            printer.print_hline((0, y), printer.size.x, " ");
-        }
+        printer.with_color(self.color, |printer| {
+            for y in 0..printer.size.y {
+                printer.print_hline((0, y), printer.size.x, " ");
+            }
+        });
         self.view.draw(printer);
     }
 }