Add gamma control and night light (#38)

Add configurable night light, smooth gamma transitions, and shell controls. Update documentation and panel tests, and fix portal test startup synchronization.

shell/ferese-shell/src/status_ui/bar.rs

@@ -174,6 +174,13 @@ fn status_label(kind: Menu, s: &Snapshot) -> String {
             |b| format!("Battery: {}%, {}", b.percent, b.status),
         ),
         Menu::System => "Control Center".into(),
+        Menu::NightLight => {
+            if s.night_light.as_ref().is_some_and(|s| s.enabled) {
+                "Night light: on".into()
+            } else {
+                "Night light: off".into()
+            }
+        }
     }
 }
 
@@ -191,6 +198,10 @@ pub(super) fn audio_icon(volume: u8, muted: bool) -> &'static [u8] {
 
 pub(super) fn status_icon(kind: Menu, s: &Snapshot) -> (&'static [u8], bool) {
     match kind {
+        Menu::NightLight => (
+            ferese_theme::icons::MOON,
+            s.night_light.as_ref().is_some_and(|s| s.enabled),
+        ),
         Menu::Network => {
             let Some(n) = &s.network else {
                 return (ferese_theme::icons::WIFI_OFF, false);

shell/ferese-shell/src/status_ui/lifecycle.rs

@@ -149,6 +149,7 @@ impl FereseShell {
     }
 
     pub fn destroy_menu(&mut self) -> Task<Message> {
+        self.night_light_temperature = None;
         let tooltip = self.dismiss_workspace_tooltip();
         crate::EFFECT_FRAME_PENDING.store(false, std::sync::atomic::Ordering::Relaxed);
         let Some(menu) = self.menu.take() else {
@@ -167,6 +168,7 @@ impl FereseShell {
     }
 
     pub fn close_menu(&mut self) -> Task<Message> {
+        self.night_light_temperature = None;
         self.refresh_media_art(false);
         let Some(menu) = &mut self.menu else {
             return Task::none();
@@ -210,6 +212,16 @@ impl FereseShell {
                 }
             }
             Action::Brightness(v) => self.status.brightness = Some(*v),
+            Action::NightLight(enabled) => {
+                if let Some(status) = &mut self.status.night_light {
+                    status.enabled = *enabled;
+                }
+            }
+            Action::NightLightTemperature(temperature) => {
+                if let Some(status) = &mut self.status.night_light {
+                    status.temperature = *temperature;
+                }
+            }
             Action::Wifi(v) => {
                 if let Some(n) = &mut self.status.network {
                     n.enabled = *v;
@@ -409,9 +421,11 @@ mod tests {
             },
         };
         assert!(anchor.belongs_to(&panel));
-        panel.end.groups[0].items[2].visible = false;
+        let items = &mut panel.end.groups[0].items;
+        let network = items.iter().position(|item| item.id.0 == "network").unwrap();
+        items[network].visible = false;
         assert!(!anchor.belongs_to(&panel));
-        panel.end.groups[0].items.remove(2);
+        panel.end.groups[0].items.remove(network);
         assert!(!anchor.belongs_to(&panel));
         panel.id = crate::panel::PanelId("other".into());
         let fallback = PopoverAnchor {

shell/ferese-shell/src/status_ui/mod.rs

@@ -8,6 +8,7 @@ mod controls;
 mod lifecycle;
 mod media;
 mod network;
+mod night_light;
 mod system;
 
 use bar::status_icon;
@@ -32,6 +33,7 @@ struct MenuStyle {
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum Menu {
+    NightLight,
     Activities,
     Workspaces,
     Network,
@@ -51,7 +53,10 @@ impl Menu {
         let relevant = self == Self::System
             || matches!(
                 (self, &error.action),
-                (Self::Network, Action::Wifi(_))
+                (
+                    Self::NightLight,
+                    Action::NightLight(_) | Action::NightLightTemperature(_)
+                ) | (Self::Network, Action::Wifi(_))
                     | (Self::Bluetooth, Action::Bluetooth(_))
                     | (Self::Audio, Action::Volume(_) | Action::Mute(_))
                     | (Self::Battery, Action::Brightness(_) | Action::PowerProfile(_))
@@ -76,6 +81,7 @@ impl Menu {
 
     fn title(self) -> &'static str {
         match self {
+            Self::NightLight => "Night light",
             Self::Activities => "Activities",
             Self::Workspaces => "Workspaces",
             Self::System => "Control Center",
@@ -93,6 +99,7 @@ impl Menu {
 
     fn available(self, status: &Snapshot) -> bool {
         match self {
+            Self::NightLight => true,
             Self::Network => status.network.is_some(),
             Self::Bluetooth => status.bluetooth.is_some(),
             Self::Audio => status.audio.is_some(),
@@ -204,6 +211,7 @@ impl FereseShell {
         }
         let mut rows = match kind {
             Menu::System => system::view(self, rows, style, true),
+            Menu::NightLight => night_light::view(self, rows, style),
             Menu::Network => network::view(self, rows, style),
             Menu::Bluetooth => bluetooth::view(self, rows, style, true),
             Menu::Audio => audio::view(self, rows, style, false),
@@ -389,6 +397,7 @@ impl FereseShell {
         }
         rows = match kind {
             Menu::System => system::view(self, rows, style, false),
+            Menu::NightLight => night_light::view(self, rows, style),
             Menu::Network => network::view(self, rows, style),
             Menu::Bluetooth => bluetooth::view(self, rows, style, false),
             Menu::Audio => audio::view(self, rows, style, false),

shell/ferese-shell/src/status_ui/night_light.rs

@@ -0,0 +1,43 @@
+use cosmic::widget::{column, slider};
+
+use super::*;
+
+pub(super) fn view<'a>(shell: &'a FereseShell, mut rows: MenuRows<'a>, style: MenuStyle) -> MenuRows<'a> {
+    let Some(status) = &shell.status.night_light else {
+        return rows.push(shell.render.text("Night light is unavailable").size(13));
+    };
+    rows = rows.push(toggle_row(
+        shell.render,
+        "Night light",
+        status.enabled,
+        Action::NightLight(!status.enabled),
+        style.theme,
+        style.opacity,
+    ));
+    let temperature = shell.night_light_temperature.unwrap_or(status.temperature);
+    let warmth = column![
+        shell
+            .render
+            .text(format!("Color temperature · {temperature} K"))
+            .size(13),
+        slider(1000..=6500, temperature, |value| cosmic::Action::App(
+            Message::NightLightTemperature(value)
+        ))
+        .step(100u16)
+        .on_release(cosmic::Action::App(Message::CommitNightLightTemperature)),
+        shell.render.text("Lower temperatures are warmer").size(12),
+    ]
+    .spacing(8);
+    rows = rows.push(control_card(shell.render, warmth.into(), style.primary, style.opacity));
+    if status.supported_outputs == 0 {
+        rows = rows.push(shell.render.text("No display supports night light").size(13));
+    } else if status.enabled && status.failed_outputs > 0 {
+        rows = rows.push(
+            shell
+                .render
+                .text("Night light could not be applied to some displays")
+                .size(12),
+        );
+    }
+    rows
+}

shell/ferese-shell/src/status_ui/system.rs

@@ -128,6 +128,7 @@ pub(super) fn view<'a>(
     }
     rows = audio::view(shell, rows, style, true);
     rows = battery::brightness(shell, rows, style);
+    rows = super::night_light::view(shell, rows, style);
     rows = notification_controls(shell, rows, style, true);
     rows
 }