feat: padding setting on surface creation

src/app/cosmic.rs

@@ -1539,6 +1539,7 @@ impl<App: Application> Cosmic<App> {
         live_settings: &LiveSettings,
     ) -> Task<crate::Action<App::Message>> {
         use iced_winit::commands::corner_radius;
+        use iced_winit::commands::layer_surface::set_padding;
 
         let id = id_wrapper.inner();
 
@@ -1563,9 +1564,14 @@ impl<App: Application> Cosmic<App> {
             if let Some(cur_rad) =
                 corners(id_wrapper, rounded, &*t, self.app.core().auto_corner_radius)
             {
-                cmds.push(corner_radius::corner_radius(id, Some(cur_rad)).discard())
+                cmds.push(corner_radius::corner_radius(id, Some(cur_rad)).discard());
             }
         }
+        if let (SurfaceIdWrapper::LayerSurface(id), Some(padding)) =
+            (id_wrapper, live_settings.padding)
+        {
+            cmds.push(set_padding(id, padding));
+        }
         Task::batch(cmds)
     }
 
@@ -1586,6 +1592,7 @@ impl<App: Application> Cosmic<App> {
             &LiveSettings {
                 blur: Some(self.blur_enabled),
                 corners: None,
+                padding: None,
             },
         );
         self.surface_views.insert(

src/surface/action.rs

@@ -8,6 +8,8 @@ use crate::Application;
 use iced::{Rectangle, window};
 #[cfg(all(feature = "wayland", target_os = "linux", feature = "winit"))]
 use iced_runtime::platform_specific::wayland::CornerRadius;
+#[cfg(all(feature = "wayland", target_os = "linux", feature = "winit"))]
+use iced_runtime::platform_specific::wayland::layer_surface::IcedMargin;
 use std::any::Any;
 use std::sync::Arc;
 
@@ -38,6 +40,9 @@ pub fn destroy_layer_shell(id: iced_core::window::Id) -> Action {
 
 #[derive(Debug, Default, Copy, Clone)]
 pub struct LiveSettings {
+    #[cfg(all(feature = "wayland", target_os = "linux", feature = "winit"))]
+    /// Override the surface padding value for the surface type.
+    pub padding: Option<IcedMargin>,
     #[cfg(all(feature = "wayland", target_os = "linux", feature = "winit"))]
     /// Override the default corner radius value for the surface type.
     pub corners: Option<CornerRadius>,