all: address clippy lints

src/ifs/wl_output.rs

@@ -51,7 +51,7 @@ const MODE_PREFERRED: u32 = 2;
 
 pub struct WlOutputGlobal {
     pub name: GlobalName,
-    pub state: Rc<State>,
+    pub _state: Rc<State>,
     pub connector: Rc<ConnectorData>,
     pub pos: Cell<Rect>,
     pub output_id: Rc<OutputId>,
@@ -127,7 +127,7 @@ impl WlOutputGlobal {
         );
         Self {
             name,
-            state: state.clone(),
+            _state: state.clone(),
             connector: connector.clone(),
             pos: Cell::new(Rect::new_sized(x, y, width, height).unwrap()),
             output_id: output_id.clone(),

src/ifs/wl_surface/zwlr_layer_surface_v1.rs

@@ -54,7 +54,7 @@ pub struct ZwlrLayerSurfaceV1 {
     pub client: Rc<Client>,
     pub surface: Rc<WlSurface>,
     pub output: Rc<OutputGlobalOpt>,
-    pub namespace: String,
+    pub _namespace: String,
     pub tracker: Tracker<Self>,
     output_extents: Cell<Rect>,
     pos: Cell<Rect>,
@@ -160,7 +160,7 @@ impl ZwlrLayerSurfaceV1 {
             client: shell.client.clone(),
             surface: surface.clone(),
             output: output.clone(),
-            namespace: namespace.to_string(),
+            _namespace: namespace.to_string(),
             tracker: Default::default(),
             output_extents: Default::default(),
             pos: Default::default(),

src/ifs/wp_presentation.rs

@@ -83,7 +83,7 @@ impl WpPresentationRequestHandler for WpPresentation {
         let fb = Rc::new(WpPresentationFeedback {
             id: req.callback,
             client: self.client.clone(),
-            surface: surface.clone(),
+            _surface: surface.clone(),
             tracker: Default::default(),
             version: self.version,
         });

src/ifs/wp_presentation_feedback.rs

@@ -13,7 +13,7 @@ use {
 pub struct WpPresentationFeedback {
     pub id: WpPresentationFeedbackId,
     pub client: Rc<Client>,
-    pub surface: Rc<WlSurface>,
+    pub _surface: Rc<WlSurface>,
     pub tracker: Tracker<Self>,
     pub version: Version,
 }

src/ifs/zwlr_screencopy_frame_v1.rs

@@ -24,7 +24,7 @@ pub struct ZwlrScreencopyFrameV1 {
     pub tracker: Tracker<Self>,
     pub output: Rc<OutputGlobalOpt>,
     pub rect: Rect,
-    pub overlay_cursor: bool,
+    pub _overlay_cursor: bool,
     pub used: Cell<bool>,
     pub with_damage: Cell<bool>,
     pub buffer: Cell<Option<Rc<WlBuffer>>>,

src/ifs/zwlr_screencopy_manager_v1.rs

@@ -125,7 +125,7 @@ impl ZwlrScreencopyManagerV1 {
             tracker: Default::default(),
             output: output.global.clone(),
             rect,
-            overlay_cursor,
+            _overlay_cursor: overlay_cursor,
             used: Cell::new(false),
             with_damage: Cell::new(false),
             buffer: Cell::new(None),