add RoutableWidgetState conception

holds the routes for an arbitrary widget

Signed-off-by: kernelkind <kernelkind@gmail.com>

src/routable_widget_state.rs

@@ -0,0 +1,26 @@
+#[derive(Default)]
+pub struct RoutableWidgetState<R: Clone> {
+    routes: Vec<R>,
+}
+
+impl<R: Clone> RoutableWidgetState<R> {
+    pub fn route_to(&mut self, route: R) {
+        self.routes.push(route);
+    }
+
+    pub fn clear(&mut self) {
+        self.routes.clear();
+    }
+
+    pub fn go_back(&mut self) {
+        self.routes.pop();
+    }
+
+    pub fn top(&self) -> Option<R> {
+        self.routes.last().cloned()
+    }
+
+    pub fn get_routes(&self) -> Vec<R> {
+        self.routes.clone()
+    }
+}