Add conversion to Href

examples/todomvc/src/main.rs

@@ -16,6 +16,16 @@ enum Filter {
     Completed,
 }
 
+impl<'a> Into<Href> for &'a Filter {
+    fn into(self) -> Href {
+        match *self {
+            Filter::All => "#/".into(),
+            Filter::Active => "#/active".into(),
+            Filter::Completed => "#/completed".into(),
+        }
+    }
+}
+
 impl Filter {
     fn fit(&self, entry: &Entry) -> bool {
         match *self {
@@ -183,7 +193,7 @@ fn view_filter(_model: &Model, filter: Filter) -> Html<Msg> {
     let flt = filter.clone();
     html! {
         <li>
-            <a href="#/", onclick=move |_| Msg::SetFilter(flt.clone()),>
+            <a href=&flt, onclick=move |_| Msg::SetFilter(flt.clone()),>
                 { filter }
             </a>
         </li>

src/html.rs

@@ -165,3 +165,26 @@ impl<T: IKeyboardEvent> From<T> for KeyData {
     }
 }
 
+#[derive(Debug)]
+pub struct Href {
+    link: String,
+}
+
+impl From<String> for Href {
+    fn from(link: String) -> Self {
+        Href { link }
+    }
+}
+
+impl<'a> From<&'a str> for Href {
+    fn from(link: &'a str) -> Self {
+        Href { link: link.to_owned() }
+    }
+}
+
+impl ToString for Href {
+    fn to_string(&self) -> String {
+        self.link.to_owned()
+    }
+}
+

src/macros.rs

@@ -49,6 +49,12 @@ macro_rules! html_impl {
         $crate::macros::attach_listener(&mut $stack, Box::new(listener));
         html_impl! { $stack ($($tail)*) }
     };
+    // Attributes:
+    ($stack:ident (href = $href:expr, $($tail:tt)*)) => {
+        let href: $crate::html::Href = $href.into();
+        $crate::macros::add_attribute(&mut $stack, "href", href);
+        html_impl! { $stack ($($tail)*) }
+    };
     ($stack:ident ($attr:ident = $val:expr, $($tail:tt)*)) => {
         $crate::macros::add_attribute(&mut $stack, stringify!($attr), $val);
         html_impl! { $stack ($($tail)*) }