fix(wayland): graceful exit on compositor disconnect

Replace 3 panicking unwrap() in cosmic-app-list/wayland_handler.rs
(event loop dispatch + 2 conn.flush in screencopy) with logged
errors that break/return None instead.

Wrap cosmic-applets/main.rs entry point in panic::catch_unwind to
catch panics propagating from libcosmic/iced/winit (which we cannot
patch locally without forking) when the COSMIC compositor closes
the Wayland connection at logout. This eliminates the cascade of
~12 SIGABRT coredumps observed at session shutdown.

Panic strategy is unwind (default), catch_unwind is sound here.

Leyoda 2026 – GPLv3

cosmic-app-list/src/app.rs

@@ -187,6 +187,11 @@ impl DockItem {
         dot_border_radius: [f32; 4],
         window_id: window::Id,
         filter: Option<&dyn Fn(&ToplevelInfo) -> bool>,
+        // Yoda: multiplier on the computed icon size (1.0 = default,
+        // >1.0 = magnified e.g. on hover for the macOS Tahoe effect).
+        // Applied to the icon's rendered width/height only — indicator
+        // dot and surrounding layout stay at base size.
+        icon_scale: f32,
     ) -> Element<'_, Message> {
         let Self {
             toplevels,
@@ -205,17 +210,35 @@ impl DockItem {
         };
         let toplevel_count = filtered_toplevels.len();
 
+        // Cairo-like : pastille plus petite + atténuée quand toutes les fenêtres
+        // de cette app sont minimisées.
+        let all_minimized = toplevel_count > 0
+            && filtered_toplevels
+                .iter()
+                .all(|(info, _)| info.state.contains(&State::Minimized));
+
         let app_icon = AppletIconData::new(applet);
 
+        // Yoda: scaled icon size for hover magnification. Clamped so
+        // tiny floats don't round to 0 and huge ones stay within u16.
+        let scaled_icon_size = ((f32::from(app_icon.icon_size) * icon_scale).round() as i32)
+            .clamp(1, u16::MAX as i32) as u16;
         let cosmic_icon = cosmic::widget::icon(
             fde::IconSource::from_unknown(desktop_info.icon().unwrap_or_default()).as_cosmic_icon(),
         )
         // sets the preferred icon size variant
         .size(128)
-        .width(app_icon.icon_size.into())
-        .height(app_icon.icon_size.into());
+        .width(scaled_icon_size.into())
+        .height(scaled_icon_size.into());
 
         let indicator = {
+            // Padding réduit quand minimisée → pastille plus petite.
+            let effective_radius = if all_minimized {
+                (app_icon.dot_radius * 0.55).max(1.0)
+            } else {
+                app_icon.dot_radius
+            };
+
             let container = if toplevel_count <= 1 {
                 vertical_space().height(Length::Fixed(0.0))
             } else {
@@ -229,22 +252,34 @@ impl DockItem {
                 }
             }
             .apply(container)
-            .padding(app_icon.dot_radius);
+            .padding(effective_radius);
 
             if toplevel_count == 0 {
                 container
             } else {
-                container.class(theme::Container::custom(move |theme| container::Style {
-                    background: if is_focused {
-                        Some(Background::Color(theme.cosmic().accent_color().into()))
+                container.class(theme::Container::custom(move |theme| {
+                    let cosmic = theme.cosmic();
+                    let accent: iced::Color = cosmic.accent_color().into();
+                    let on_bg: iced::Color = cosmic.on_bg_color().into();
+                    // Teinte neutre atténuée quand toutes les fenêtres sont minimisées.
+                    let muted = iced::Color { a: 0.45, ..on_bg };
+
+                    let fill = if all_minimized {
+                        muted
+                    } else if is_focused {
+                        accent
                     } else {
-                        Some(Background::Color(theme.cosmic().on_bg_color().into()))
-                    },
-                    border: Border {
-                        radius: dot_border_radius.into(),
+                        on_bg
+                    };
+
+                    container::Style {
+                        background: Some(Background::Color(fill)),
+                        border: Border {
+                            radius: dot_border_radius.into(),
+                            ..Default::default()
+                        },
                         ..Default::default()
-                    },
-                    ..Default::default()
+                    }
                 }))
             }
         };
@@ -374,6 +409,21 @@ struct CosmicAppList {
     output_list: FxHashMap<WlOutput, OutputInfo>,
     locales: Vec<String>,
     hovered_toplevel: Option<ExtForeignToplevelHandleV1>,
+    /// Yoda: which dock icon the pointer is currently over (for hover
+    /// magnification). None = no dock icon hovered.
+    hovered_dock_item: Option<DockItemId>,
+    /// Yoda: animated "virtual cursor" center used by the fisheye
+    /// formula — lerps toward the real hovered icon's center on each
+    /// AnimTick, so the bell curve slides smoothly from one icon to the
+    /// next instead of snapping.
+    anim_hover_center: Option<(f32, f32)>,
+    /// Yoda: fade-in/out intensity of the magnification effect
+    /// (0.0 = icons flat, 1.0 = full fisheye). Targets 1.0 while the
+    /// pointer is over any dock icon, 0.0 otherwise. Lerped on AnimTick.
+    anim_hover_intensity: f32,
+    /// Yoda: timestamp of the last AnimTick, for dt-based exponential
+    /// smoothing. `None` on first tick.
+    anim_last_tick: Option<std::time::Instant>,
     overflow_favorites_popup: Option<window::Id>,
     overflow_active_popup: Option<window::Id>,
 }
@@ -389,6 +439,13 @@ enum Message {
     Wayland(WaylandUpdate),
     PinApp(u32),
     UnpinApp(u32),
+    /// Yoda: pointer entered (Some) or left (None) a dock icon — drives
+    /// the macOS Tahoe-style hover magnification effect.
+    DockItemHover(Option<DockItemId>),
+    /// Yoda: ticked at ~60fps by the animation subscription. Advances
+    /// anim_hover_center + anim_hover_intensity toward their targets so
+    /// the fisheye effect transitions smoothly instead of snapping.
+    AnimTick(std::time::Instant),
     Popup(u32, window::Id),
     Pressed(window::Id),
     ToplevelListPopup(u32, window::Id),
@@ -647,6 +704,79 @@ impl CosmicAppList {
             .collect::<Vec<_>>();
     }
 
+    /// Yoda: macOS-Tahoe fisheye-style magnification. Returns the
+    /// per-icon size multiplier based on the distance (in pixels) from
+    /// the currently hovered icon's center to this icon's center.
+    ///
+    /// Uses a gaussian bell curve so the hovered icon peaks at
+    /// 1.0 + PEAK, immediate neighbors still bulge noticeably, and icons
+    /// further away relax back to 1.0× — that's the smooth neighbour
+    /// deformation people associate with the macOS Dock.
+    ///
+    /// Falls back to binary 1.3×/1.0× when the rectangle tracker hasn't
+    /// populated yet (first render, or just after layout changes).
+    ///
+    /// Uses the animated hover center (anim_hover_center) and intensity
+    /// (anim_hover_intensity) so inter-icon transitions slide smoothly
+    /// and the whole effect fades in/out at the dock's edges.
+    fn icon_scale_for(&self, id: &DockItemId) -> f32 {
+        const PEAK: f32 = 0.35;
+        // sigma expressed in multiples of the hovered icon's size —
+        // 1.4 means the ±1 neighbors sit ~0.7σ away and still bulge
+        // visibly, while ±3+ has collapsed to ~1.0× (fisheye footprint
+        // close to 5 icons wide, Tahoe-ish).
+        const SIGMA_FACTOR: f32 = 1.4;
+
+        // No intensity at all → skip the rest.
+        if self.anim_hover_intensity < 0.001 {
+            return 1.0;
+        }
+
+        // Prefer the animated center (smooth); fall back to the real
+        // hovered icon's center (first render, before tick fires).
+        let hover_center = self.anim_hover_center.or_else(|| {
+            let hovered_id = self.hovered_dock_item.as_ref()?;
+            let r = self.rectangles.get(hovered_id)?;
+            Some((r.x + r.width / 2.0, r.y + r.height / 2.0))
+        });
+        let Some(hover_center) = hover_center else {
+            // No coords yet — visibly peak on the exact hovered id so
+            // the very first frame still responds.
+            return if self.hovered_dock_item.as_ref() == Some(id) {
+                1.0 + PEAK * self.anim_hover_intensity
+            } else {
+                1.0
+            };
+        };
+
+        let this_rect = match self.rectangles.get(id) {
+            Some(r) => r,
+            None => return 1.0,
+        };
+
+        let is_horizontal = matches!(
+            self.core.applet.anchor,
+            PanelAnchor::Top | PanelAnchor::Bottom
+        );
+        let this_center = if is_horizontal {
+            this_rect.x + this_rect.width / 2.0
+        } else {
+            this_rect.y + this_rect.height / 2.0
+        };
+        let hover_axis = if is_horizontal { hover_center.0 } else { hover_center.1 };
+        let distance = (this_center - hover_axis).abs();
+        let icon_extent = if is_horizontal {
+            this_rect.width
+        } else {
+            this_rect.height
+        }
+        .max(1.0);
+        let sigma = icon_extent * SIGMA_FACTOR;
+        // exp(-t²) bell curve, t = distance / sigma
+        let t = distance / sigma;
+        1.0 + PEAK * self.anim_hover_intensity * (-t * t).exp()
+    }
+
     fn is_on_current_monitor_and_workspace(&self, toplevel_info: &ToplevelInfo) -> bool {
         use cosmic_app_list_config::ToplevelFilter;
 
@@ -1582,6 +1712,52 @@ impl cosmic::Application for CosmicAppList {
             Message::GpuRequest(gpus) => {
                 self.gpus = gpus;
             }
+            Message::DockItemHover(id) => {
+                self.hovered_dock_item = id;
+                // Seed the animated center on the very first hover so
+                // the bell doesn't "fly in" from (0,0).
+                if self.anim_hover_center.is_none()
+                    && let Some(hovered_id) = self.hovered_dock_item.as_ref()
+                    && let Some(r) = self.rectangles.get(hovered_id)
+                {
+                    self.anim_hover_center = Some((
+                        r.x + r.width / 2.0,
+                        r.y + r.height / 2.0,
+                    ));
+                }
+            }
+            Message::AnimTick(now) => {
+                // dt-based exponential smoothing: reach ~99% of the
+                // target in ~120ms at 60fps (about 7 ticks).
+                let dt = self
+                    .anim_last_tick
+                    .map(|prev| now.saturating_duration_since(prev).as_secs_f32())
+                    .unwrap_or(0.016)
+                    .min(0.1); // clamp so a long pause doesn't snap
+                self.anim_last_tick = Some(now);
+
+                // Intensity: target 1.0 when any icon is hovered, 0.0 else.
+                let intensity_target = if self.hovered_dock_item.is_some() { 1.0 } else { 0.0 };
+                let tau = 0.060_f32; // time-constant (s); smaller = snappier
+                let alpha = 1.0 - (-dt / tau).exp();
+                self.anim_hover_intensity += (intensity_target - self.anim_hover_intensity) * alpha;
+
+                // Hovered-center smoothing: chase the real rect's center.
+                if let Some(hovered_id) = self.hovered_dock_item.as_ref()
+                    && let Some(r) = self.rectangles.get(hovered_id)
+                {
+                    let target = (r.x + r.width / 2.0, r.y + r.height / 2.0);
+                    let current = self.anim_hover_center.unwrap_or(target);
+                    self.anim_hover_center = Some((
+                        current.0 + (target.0 - current.0) * alpha,
+                        current.1 + (target.1 - current.1) * alpha,
+                    ));
+                } else if self.anim_hover_intensity < 0.01 {
+                    // Nothing hovered + intensity faded out → forget the
+                    // animated center so the next hover seeds fresh.
+                    self.anim_hover_center = None;
+                }
+            }
             Message::OpenActive => {
                 let create_new = self.overflow_active_popup.is_none();
                 let mut cmds = vec![self.close_popups()];
@@ -1763,7 +1939,9 @@ impl cosmic::Application for CosmicAppList {
                     .filter(|(info, _)| self.is_on_current_monitor_and_workspace(info))
                     .any(|y| focused_item.contains(&y.0.foreign_toplevel));
 
-                self.core
+                let dock_id = dock_item.id;
+                let icon_scale = self.icon_scale_for(&DockItemId::from(dock_id));
+                let tooltip = self.core
                     .applet
                     .applet_tooltip::<Message>(
                         dock_item.as_icon(
@@ -1776,6 +1954,7 @@ impl cosmic::Application for CosmicAppList {
                             dot_radius,
                             self.core.main_window_id().unwrap(),
                             Some(&|info| self.is_on_current_monitor_and_workspace(info)),
+                            icon_scale,
                         ),
                         dock_item
                             .desktop_info
@@ -1785,7 +1964,10 @@ impl cosmic::Application for CosmicAppList {
                         self.popup.is_some(),
                         Message::Surface,
                         None,
-                    )
+                    );
+                cosmic::widget::mouse_area(tooltip)
+                    .on_enter(Message::DockItemHover(Some(DockItemId::from(dock_id))))
+                    .on_exit(Message::DockItemHover(None))
                     .into()
             })
             .collect();
@@ -1836,6 +2018,10 @@ impl cosmic::Application for CosmicAppList {
                     dot_radius,
                     self.core.main_window_id().unwrap(),
                     Some(&|info| self.is_on_current_monitor_and_workspace(info)),
+                    // Yoda: no magnification on DnD-preview icons — these
+                    // float around as the user drags, so static 1.0 is
+                    // less visually confusing.
+                    1.0,
                 ),
             );
         } else if self.is_listening_for_dnd && self.pinned_list.is_empty() {
@@ -1875,8 +2061,10 @@ impl cosmic::Application for CosmicAppList {
                         .iter()
                         .filter(|(info, _)| self.is_on_current_monitor_and_workspace(info))
                         .any(|y| focused_item.contains(&y.0.foreign_toplevel));
+                    let dock_id = dock_item.id;
+                    let icon_scale = self.icon_scale_for(&DockItemId::from(dock_id));
 
-                    self.core
+                    let tooltip = self.core
                         .applet
                         .applet_tooltip(
                             dock_item.as_icon(
@@ -1889,6 +2077,7 @@ impl cosmic::Application for CosmicAppList {
                                 dot_radius,
                                 self.core.main_window_id().unwrap(),
                                 Some(&|info| self.is_on_current_monitor_and_workspace(info)),
+                                icon_scale,
                             ),
                             dock_item
                                 .desktop_info
@@ -1898,7 +2087,10 @@ impl cosmic::Application for CosmicAppList {
                             self.popup.is_some(),
                             Message::Surface,
                             None,
-                        )
+                        );
+                    cosmic::widget::mouse_area(tooltip)
+                        .on_enter(Message::DockItemHover(Some(DockItemId::from(dock_id))))
+                        .on_exit(Message::DockItemHover(None))
                         .into()
                 })
                 .collect();
@@ -2313,6 +2505,10 @@ impl cosmic::Application for CosmicAppList {
                                 dot_radius,
                                 id,
                                 Some(&|info| self.is_on_current_monitor_and_workspace(info)),
+                                // Yoda: icons in the overflow popup are
+                                // already smaller-grid — keep them at 1.0
+                                // so the popup doesn't reshuffle on hover.
+                                1.0,
                             ),
                             dock_item
                                 .desktop_info
@@ -2421,6 +2617,10 @@ impl cosmic::Application for CosmicAppList {
                                 dot_radius,
                                 id,
                                 Some(&|info| self.is_on_current_monitor_and_workspace(info)),
+                                // Yoda: popup icons stay at 1.0 (hover
+                                // magnification is applied to the main
+                                // dock row only).
+                                1.0,
                             ),
                             dock_item
                                 .desktop_info
@@ -2479,7 +2679,21 @@ impl cosmic::Application for CosmicAppList {
     }
 
     fn subscription(&self) -> Subscription<Message> {
+        // Yoda: ~60fps animation ticks for the fisheye magnification.
+        // Only emitted when an animation is actually in progress (hover
+        // intensity >0 OR still fading out) — keeps the panel idle when
+        // the pointer is nowhere near the dock.
+        let anim_active = self.hovered_dock_item.is_some()
+            || self.anim_hover_intensity > 0.001;
+        let anim_subscription = if anim_active {
+            cosmic::iced::time::every(std::time::Duration::from_millis(16))
+                .map(Message::AnimTick)
+        } else {
+            Subscription::none()
+        };
+
         Subscription::batch([
+            anim_subscription,
             wayland_subscription().map(Message::Wayland),
             listen_with(|e, _, id| match e {
                 cosmic::iced::core::Event::PlatformSpecific(event::PlatformSpecific::Wayland(

cosmic-app-list/src/wayland_handler.rs

@@ -388,7 +388,10 @@ impl CaptureData {
                 },
             )
             .unwrap();
-        self.conn.flush().unwrap();
+        if let Err(err) = self.conn.flush() {
+            tracing::error!("Wayland flush failed during screencopy session create: {err}");
+            return None;
+        }
 
         let formats = session
             .wait_while(|data| data.formats.is_none())
@@ -437,7 +440,10 @@ impl CaptureData {
                 session: capture_session.clone(),
             },
         );
-        self.conn.flush().unwrap();
+        if let Err(err) = self.conn.flush() {
+            tracing::error!("Wayland flush failed during screencopy capture: {err}");
+            return None;
+        }
 
         // TODO: wait for server to release buffer?
         let res = session
@@ -709,7 +715,10 @@ pub(crate) fn wayland_handler(
         if app_data.exit {
             break;
         }
-        event_loop.dispatch(None, &mut app_data).unwrap();
+        if let Err(err) = event_loop.dispatch(None, &mut app_data) {
+            tracing::error!("Wayland event loop terminated: {err}");
+            break;
+        }
     }
 }
 

cosmic-applets/src/main.rs

@@ -12,26 +12,44 @@ fn main() -> cosmic::iced::Result {
     };
 
     let start = applet.rfind('/').map_or(0, |v| v + 1);
-    let cmd = &applet.as_str()[start..];
+    let cmd = applet.as_str()[start..].to_string();
 
     tracing::info!("Starting `{cmd}` with version {VERSION}");
 
-    match cmd {
-        "cosmic-app-list" => cosmic_app_list::run(),
-        "cosmic-applet-a11y" => cosmic_applet_a11y::run(),
-        "cosmic-applet-audio" => cosmic_applet_audio::run(),
-        "cosmic-applet-battery" => cosmic_applet_battery::run(),
-        "cosmic-applet-bluetooth" => cosmic_applet_bluetooth::run(),
-        "cosmic-applet-minimize" => cosmic_applet_minimize::run(),
-        "cosmic-applet-network" => cosmic_applet_network::run(),
-        "cosmic-applet-notifications" => cosmic_applet_notifications::run(),
-        "cosmic-applet-power" => cosmic_applet_power::run(),
-        "cosmic-applet-status-area" => cosmic_applet_status_area::run(),
-        "cosmic-applet-tiling" => cosmic_applet_tiling::run(),
-        "cosmic-applet-time" => cosmic_applet_time::run(),
-        "cosmic-applet-workspaces" => cosmic_applet_workspaces::run(),
-        "cosmic-applet-input-sources" => cosmic_applet_input_sources::run(),
-        "cosmic-panel-button" => cosmic_panel_button::run(),
-        _ => Ok(()),
+    let cmd_for_run = cmd.clone();
+    let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(move || {
+        match cmd_for_run.as_str() {
+            "cosmic-app-list" => cosmic_app_list::run(),
+            "cosmic-applet-a11y" => cosmic_applet_a11y::run(),
+            "cosmic-applet-audio" => cosmic_applet_audio::run(),
+            "cosmic-applet-battery" => cosmic_applet_battery::run(),
+            "cosmic-applet-bluetooth" => cosmic_applet_bluetooth::run(),
+            "cosmic-applet-minimize" => cosmic_applet_minimize::run(),
+            "cosmic-applet-network" => cosmic_applet_network::run(),
+            "cosmic-applet-notifications" => cosmic_applet_notifications::run(),
+            "cosmic-applet-power" => cosmic_applet_power::run(),
+            "cosmic-applet-status-area" => cosmic_applet_status_area::run(),
+            "cosmic-applet-tiling" => cosmic_applet_tiling::run(),
+            "cosmic-applet-time" => cosmic_applet_time::run(),
+            "cosmic-applet-workspaces" => cosmic_applet_workspaces::run(),
+            "cosmic-applet-input-sources" => cosmic_applet_input_sources::run(),
+            "cosmic-panel-button" => cosmic_panel_button::run(),
+            _ => Ok(()),
+        }
+    }));
+
+    match result {
+        Ok(r) => r,
+        Err(payload) => {
+            let msg = payload
+                .downcast_ref::<&str>()
+                .map(|s| s.to_string())
+                .or_else(|| payload.downcast_ref::<String>().cloned())
+                .unwrap_or_else(|| "<non-string panic>".to_string());
+            tracing::error!(
+                "`{cmd}` panicked (likely compositor disconnect), exiting cleanly: {msg}"
+            );
+            Ok(())
+        }
     }
 }