Improve compat w/ X11 and Wayland on linux (#155)

* Improve compat w/ X11 and Wayland on linux

* Move unix import in linux cfg scope

Author: zephraph

src/lib.rs

@@ -496,8 +496,17 @@ pub fn run(webview_options: Options) -> wry::Result<()> {
     if let Some(user_agent) = webview_options.user_agent {
         webview_builder = webview_builder.with_user_agent(user_agent.as_str());
     }
+    #[cfg(not(target_os = "linux"))]
     let webview = webview_builder.build(&window)?;
 
+    #[cfg(target_os = "linux")]
+    let webview = {
+        use tao::platform::unix::WindowExtUnix;
+        use wry::WebViewBuilderExtUnix;
+        let vbox = window.default_vbox().unwrap();
+        webview_builder.build_gtk(vbox)?
+    };
+
     let notify_tx = tx.clone();
     let notify = move |notification: Notification| {
         debug!(notification = ?notification, "Sending notification to client");