implement tab title update

src/app/browser/window/tab.rs

@@ -155,7 +155,16 @@ impl Tab {
     pub fn update(&self) {
         if let Some(id) = self.widget.current_page_keyword() {
             if let Some(item) = self.index.borrow().get(&id) {
+                // Update item components
                 item.update();
+
+                // Update tab title
+                let title = match item.page_meta_title() {
+                    Some(value) => value,
+                    None => GString::new(),
+                };
+
+                item.gobject().set_title(title.as_str());
             }
         }
     }

src/app/browser/window/tab/item.rs

@@ -187,6 +187,10 @@ impl Item {
         self.id.clone()
     }
 
+    pub fn page_meta_title(&self) -> Option<GString> {
+        self.page.meta_title()
+    }
+
     pub fn gobject(&self) -> &TabPage {
         &self.widget.gobject()
     }

src/app/browser/window/tab/item/page.rs

@@ -463,6 +463,10 @@ impl Page {
     }
 
     // Getters
+    pub fn meta_title(&self) -> Option<GString> {
+        self.meta.borrow().title.clone()
+    }
+
     pub fn gobject(&self) -> &Box {
         &self.widget.gobject()
     }