ShowWidget: Keep track of the podcast it was created from.

Since ShowStack now keeps a refference to ShowWidget we no
longer need to encode it in the widget name.

hammond-gtk/src/stacks/show.rs

@@ -76,38 +76,33 @@ impl ShowStack {
     pub fn replace_widget(&mut self, pd: Arc<Podcast>) -> Result<(), Error> {
         let old = self.show.container.clone();
 
-        let oldname = WidgetExt::get_name(&old);
-        debug!("Name: {:?}", oldname);
-        oldname
-            .clone()
-            .and_then(|id| id.parse().ok())
+        // save the ShowWidget vertical scrollabar alignment
+        self.show
+            .podcast_id()
             .map(|id| self.show.save_vadjustment(id));
 
         let new = ShowWidget::new(pd, self.sender.clone());
-        // Each composite ShowWidget is a gtkBox with the Podcast.id encoded in the
-        // gtk::Widget name. It's a hack since we can't yet subclass GObject
-        // easily.
-        debug!(
-            "Old widget Name: {:?}\nNew widget Name: {:?}",
-            oldname,
-            WidgetExt::get_name(&new.container)
-        );
-
         self.show = new;
         self.stack.remove(&old);
         self.stack.add_named(&self.show.container, "widget");
+
+        // The current visible child might change depending on
+        // removal and insertion in the gtk::Stack, so we have
+        // to make sure it will stay the same.
+        let s = self.state.clone();
+        self.switch_visible(s);
+
         Ok(())
     }
 
     pub fn update_widget(&mut self) -> Result<(), Error> {
         let old = self.show.container.clone();
-        let id = WidgetExt::get_name(&old);
-        if id == Some("GtkBox".to_string()) || id.is_none() {
+        let id = self.show.podcast_id();
+        if id.is_none() {
             return Ok(());
         }
 
-        let id = id.ok_or_else(|| format_err!("Failed to get widget's name."))?;
-        let pd = dbqueries::get_podcast_from_id(id.parse::<i32>()?)?;
+        let pd = dbqueries::get_podcast_from_id(id.unwrap_or_default())?;
         self.replace_widget(Arc::new(pd))?;
 
         // The current visible child might change depending on
@@ -122,13 +117,11 @@ impl ShowStack {
 
     // Only update widget if it's podcast_id is equal to pid.
     pub fn update_widget_if_same(&mut self, pid: i32) -> Result<(), Error> {
-        let old = &self.show.container.clone();
-
-        let id = WidgetExt::get_name(old);
-        if id != Some(pid.to_string()) || id.is_none() {
+        if self.show.podcast_id() == Some(pid) {
             debug!("Different widget. Early return");
             return Ok(());
         }
+
         self.update_widget()
     }
 

hammond-gtk/src/widgets/show.rs

@@ -36,6 +36,7 @@ pub struct ShowWidget {
     settings: gtk::MenuButton,
     unsub: gtk::Button,
     episodes: gtk::ListBox,
+    podcast_id: Option<i32>,
 }
 
 impl Default for ShowWidget {
@@ -61,6 +62,7 @@ impl Default for ShowWidget {
             link,
             settings,
             episodes,
+            podcast_id: None,
         }
     }
 }
@@ -68,27 +70,27 @@ impl Default for ShowWidget {
 impl ShowWidget {
     #[inline]
     pub fn new(pd: Arc<Podcast>, sender: Sender<Action>) -> Rc<ShowWidget> {
-        let pdw = Rc::new(ShowWidget::default());
+        let mut pdw = ShowWidget::default();
         pdw.init(pd.clone(), sender.clone());
+        let pdw = Rc::new(pdw);
         populate_listbox(&pdw, pd, sender)
             .map_err(|err| error!("Failed to populate the listbox: {}", err))
             .ok();
+
         pdw
     }
 
     #[inline]
-    pub fn init(&self, pd: Arc<Podcast>, sender: Sender<Action>) {
+    pub fn init(&mut self, pd: Arc<Podcast>, sender: Sender<Action>) {
         let builder = gtk::Builder::new_from_resource("/org/gnome/hammond/gtk/show_widget.ui");
 
-        // Hacky workaround so the pd.id() can be retrieved from the `ShowStack`.
-        WidgetExt::set_name(&self.container, &pd.id().to_string());
-
         self.unsub
             .connect_clicked(clone!(pd, sender => move |bttn| {
                 on_unsub_button_clicked(pd.clone(), bttn, sender.clone());
         }));
 
         self.set_description(pd.description());
+        self.podcast_id = Some(pd.id());
 
         self.set_cover(pd.clone())
             .map_err(|err| error!("Failed to set a cover: {}", err))
@@ -168,6 +170,10 @@ impl ShowWidget {
 
         Ok(())
     }
+
+    pub fn podcast_id(&self) -> Option<i32> {
+        self.podcast_id
+    }
 }
 
 #[inline]