Add automatic idle inhibition for fullscreen playback and selected apps

compositor/src/config.rs

@@ -34,6 +34,8 @@ pub struct Config {
     #[serde(default)]
     lock_screen: crate::session_lock::IdleSettings,
     #[serde(default)]
+    idle_inhibit: crate::idle_inhibition::Settings,
+    #[serde(default)]
     desktop_widgets: ferese_config::desktop::DesktopWidgets,
     #[serde(default)]
     pub(crate) autostart: Vec<DaemonConfig>,
@@ -115,6 +117,7 @@ impl Config {
         let bindings = self.bindings(&input_settings)?;
         Ok(crate::RuntimeConfig {
             lock_idle: self.lock_screen.validate()?,
+            idle_inhibit: self.idle_inhibit,
             autostart: self.autostart.clone(),
             layout_mode: self.layout_mode(),
             workspace_auto_back_and_forth: self.workspaces.auto_back_and_forth,

compositor/src/handlers/xdg_shell.rs

@@ -36,6 +36,7 @@ impl XdgShellHandler for Ferese {
     fn title_changed(&mut self, surface: ToplevelSurface) {
         self.refresh_capture_privacy();
         if self.windows.refresh_metadata(surface.wl_surface()) {
+            self.refresh_idle_inhibition();
             self.send_shell_snapshots();
             for output in self.surface_outputs(surface.wl_surface()) {
                 self.defer_output_redraw(output);
@@ -46,6 +47,7 @@ impl XdgShellHandler for Ferese {
     fn app_id_changed(&mut self, surface: ToplevelSurface) {
         self.refresh_capture_privacy();
         if self.windows.refresh_metadata(surface.wl_surface()) {
+            self.refresh_idle_inhibition();
             self.send_shell_snapshots();
             for output in self.surface_outputs(surface.wl_surface()) {
                 self.defer_output_redraw(output);
@@ -55,6 +57,7 @@ impl XdgShellHandler for Ferese {
 
     fn parent_changed(&mut self, surface: ToplevelSurface) {
         self.refresh_capture_privacy();
+        self.refresh_idle_inhibition();
         let Some(parent) = surface.parent() else {
             return;
         };

compositor/src/idle_inhibition.rs

@@ -0,0 +1,268 @@
+//! Automatic policy feeds the same idle notifier as Wayland and portal requests.
+pub(crate) mod media;
+
+use std::collections::HashSet;
+
+use ferese_layout::WindowId;
+use serde::Deserialize;
+use smithay::reexports::wayland_server::Resource;
+use smithay::wayland::compositor::with_states;
+use smithay::wayland::shell::xdg::XdgToplevelSurfaceData;
+
+use crate::Ferese;
+
+#[derive(Clone, Copy, Debug, Deserialize, PartialEq, Eq)]
+#[serde(default, deny_unknown_fields)]
+pub(crate) struct Settings {
+    pub fullscreen_playback: bool,
+}
+
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            fullscreen_playback: true,
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "kebab-case")]
+pub enum Mode {
+    None,
+    Visible,
+    Fullscreen,
+    Playing,
+    FullscreenPlaying,
+}
+
+impl Mode {
+    fn inhibits(self, visible: bool, fullscreen: bool, playing: bool) -> bool {
+        visible
+            && match self {
+                Self::None => false,
+                Self::Visible => true,
+                Self::Fullscreen => fullscreen,
+                Self::Playing => playing,
+                Self::FullscreenPlaying => fullscreen && playing,
+            }
+    }
+}
+
+#[derive(Clone, Copy)]
+struct AppWindow<'a> {
+    id: WindowId,
+    pid: Option<u32>,
+    app_id: &'a str,
+}
+
+/// MPRIS reports application playback, not which of its windows owns a video.
+/// Prefer process credentials; use DesktopEntry only when no process matches.
+/// Multiple matching windows are ambiguous, including hidden windows.
+fn player_window(player: &media::Player, windows: &[AppWindow<'_>]) -> Option<WindowId> {
+    let mut matches = windows
+        .iter()
+        .filter(|window| player.pid.is_some() && window.pid == player.pid);
+    if let Some(window) = matches.next() {
+        return matches.next().is_none().then_some(window.id);
+    }
+
+    let desktop = player.desktop_entry.as_deref()?;
+    let mut matches = windows
+        .iter()
+        .filter(|window| crate::window_rules::normalize_app_id(window.app_id) == desktop);
+    let window = matches.next()?;
+    matches.next().is_none().then_some(window.id)
+}
+
+impl Ferese {
+    pub(crate) fn refresh_idle_inhibition(&mut self) {
+        let playing = self.media_players.iter().any(|player| player.playing);
+        let has_rules = self.window_rules.iter().any(|rule| rule.idle_policy().is_some());
+        let selected = self
+            .window_rules
+            .iter()
+            .any(|rule| rule.idle_policy().is_some_and(|mode| mode != Mode::None));
+        let playback_policy = self.idle_inhibit.fullscreen_playback
+            || self
+                .window_rules
+                .iter()
+                .any(|rule| matches!(rule.idle_policy(), Some(Mode::Playing | Mode::FullscreenPlaying)));
+        let automatic = (playback_policy && playing) || selected;
+        let eligible = if self.idle_inhibitors.is_empty() && !automatic {
+            Default::default()
+        } else {
+            self.callback_outputs()
+        };
+
+        let application = if playback_policy && playing {
+            self.windows
+                .records()
+                .map(|(&id, record)| {
+                    let pid = record
+                        .surface
+                        .as_ref()
+                        .and_then(|surface| surface.client())
+                        .and_then(|client| client.get_credentials(&self.display_handle).ok())
+                        .and_then(|credentials| u32::try_from(credentials.pid).ok());
+                    AppWindow {
+                        id,
+                        pid,
+                        app_id: &record.app_id,
+                    }
+                })
+                .collect::<Vec<_>>()
+        } else {
+            Vec::new()
+        };
+        let playing_windows = self
+            .media_players
+            .iter()
+            .filter(|player| player.playing)
+            .filter_map(|player| player_window(player, &application))
+            .collect::<HashSet<_>>();
+
+        let automatic = automatic
+            && !self.session_lock.active()
+            && self.windows.records().any(|(&id, record)| {
+                let Some(surface) = &record.surface else {
+                    return false;
+                };
+                if !eligible.contains_key(&surface.into()) {
+                    return false;
+                }
+
+                let explicit = has_rules
+                    .then(|| {
+                        let transient = with_states(surface, |states| {
+                            states
+                                .data_map
+                                .get::<XdgToplevelSurfaceData>()
+                                .is_some_and(|data| data.lock().unwrap().parent.is_some())
+                        });
+                        crate::window_rules::resolve(
+                            &self.window_rules,
+                            Some(&record.app_id),
+                            Some(&record.title),
+                            transient,
+                        )
+                        .idle_inhibit
+                    })
+                    .flatten();
+                let mode = explicit.unwrap_or(if self.idle_inhibit.fullscreen_playback {
+                    Mode::FullscreenPlaying
+                } else {
+                    Mode::None
+                });
+                let fullscreen = self
+                    .workspaces
+                    .workspace_for_window(id)
+                    .and_then(|workspace| self.workspaces.workspace(workspace))
+                    .is_some_and(|workspace| workspace.fullscreen == Some(id));
+
+                mode.inhibits(true, fullscreen, playing_windows.contains(&id))
+            });
+        let requested = self
+            .idle_inhibitors
+            .keys()
+            .any(|surface| eligible.contains_key(&surface.into()));
+        self.automatic_idle_inhibited = automatic;
+        self.idle_notifier_state
+            .set_is_inhibited(automatic || requested || self.portal_session.idle_inhibited());
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn policy_releases_on_pause_hidden_window_and_fullscreen_exit() {
+        assert!(Mode::FullscreenPlaying.inhibits(true, true, true));
+        assert!(!Mode::FullscreenPlaying.inhibits(true, true, false));
+        assert!(!Mode::FullscreenPlaying.inhibits(false, true, true));
+        assert!(!Mode::FullscreenPlaying.inhibits(true, false, true));
+        assert!(Mode::Visible.inhibits(true, false, false));
+        assert!(!Mode::Visible.inhibits(false, true, true));
+        assert!(Mode::Playing.inhibits(true, false, true));
+        assert!(!Mode::Playing.inhibits(true, false, false));
+        assert!(Mode::Fullscreen.inhibits(true, true, false));
+        assert!(!Mode::None.inhibits(true, true, true));
+    }
+
+    #[test]
+    fn configuration_validates_modes_and_keeps_idle_rules_out_of_placement() {
+        let config = crate::config::Config::parse_source(
+            "idle-inhibit { fullscreen-playback #false; }\nwindow-rule app-id=\"player\" idle-inhibit=\"visible\"\nwindow-rule app-id=\"player\" title=\"Private\" idle-inhibit=\"none\"\n",
+        ).unwrap().runtime_config().unwrap();
+        assert!(!config.idle_inhibit.fullscreen_playback);
+        let visible = crate::window_rules::resolve(&config.window_rules, Some("player"), None, false);
+        assert_eq!(visible.idle_inhibit, Some(Mode::Visible));
+        let none = crate::window_rules::resolve(&config.window_rules, Some("player"), Some("Private"), false);
+        assert_eq!(none.idle_inhibit, Some(Mode::None));
+        assert_eq!(crate::window_rules::live_result(visible, none, false), None);
+        for mode in ["playing", "fullscreen", "fullscreen-playing", "none"] {
+            assert!(
+                crate::config::Config::parse_source(&format!(
+                    "window-rule app-id=\"player\" idle-inhibit=\"{mode}\"\n"
+                ))
+                .unwrap()
+                .runtime_config()
+                .is_ok()
+            );
+        }
+        assert!(
+            crate::config::Config::parse_source("window-rule app-id=\"player\" idle-inhibit=\"alwayss\"\n").is_err()
+        );
+        assert!(crate::config::Config::parse_source("idle-inhibit { fullscreen-playback \"yes\"; }\n").is_err());
+    }
+
+    #[test]
+    fn player_identity_prefers_pid_and_rejects_ambiguous_or_closed_windows() {
+        let player = media::Player {
+            name: "org.mpris.MediaPlayer2.test".into(),
+            owner: ":1.5".into(),
+            pid: Some(42),
+            desktop_entry: Some("player".into()),
+            playing: true,
+        };
+        let window = AppWindow {
+            id: WindowId(1),
+            pid: Some(42),
+            app_id: "other",
+        };
+        let unrelated = AppWindow {
+            id: WindowId(2),
+            pid: Some(99),
+            app_id: "Player.desktop",
+        };
+        assert_eq!(player_window(&player, &[window, unrelated]), Some(window.id));
+        assert_eq!(player_window(&player, &[unrelated]), Some(unrelated.id));
+        assert_eq!(player_window(&player, &[]), None);
+        assert_eq!(
+            player_window(
+                &player,
+                &[
+                    window,
+                    AppWindow {
+                        id: WindowId(3),
+                        ..window
+                    }
+                ]
+            ),
+            None
+        );
+        assert_eq!(
+            player_window(
+                &player,
+                &[
+                    unrelated,
+                    AppWindow {
+                        id: WindowId(4),
+                        ..unrelated
+                    }
+                ]
+            ),
+            None
+        );
+    }
+}

compositor/src/idle_inhibition/media.rs

@@ -0,0 +1,245 @@
+//! MPRIS reads and signal handling run off the compositor thread, without polling.
+use std::collections::HashMap;
+use std::time::Duration;
+
+use calloop::EventLoop;
+use calloop::channel::{Event, channel};
+use futures_lite::{StreamExt, future, stream};
+use zbus::zvariant::OwnedValue;
+use zbus::{Connection, MatchRule, MessageStream};
+
+use crate::Ferese;
+
+const PREFIX: &str = "org.mpris.MediaPlayer2";
+const PATH: &str = "/org/mpris/MediaPlayer2";
+const PLAYER: &str = "org.mpris.MediaPlayer2.Player";
+const PROPERTIES: &str = "org.freedesktop.DBus.Properties";
+const MAX_PLAYERS: usize = 64;
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub(crate) struct Player {
+    pub name: String,
+    pub owner: String,
+    pub pid: Option<u32>,
+    pub desktop_entry: Option<String>,
+    pub playing: bool,
+}
+
+async fn bus_call<T: serde::de::DeserializeOwned + zbus::zvariant::Type>(
+    connection: &Connection,
+    member: &str,
+    name: &str,
+) -> zbus::Result<T> {
+    connection
+        .call_method(
+            Some("org.freedesktop.DBus"),
+            "/org/freedesktop/DBus",
+            Some("org.freedesktop.DBus"),
+            member,
+            &(name,),
+        )
+        .await?
+        .body()
+        .deserialize()
+}
+
+async fn property(connection: &Connection, owner: &str, interface: &str, name: &str) -> zbus::Result<OwnedValue> {
+    connection
+        .call_method(Some(owner), PATH, Some(PROPERTIES), "Get", &(interface, name))
+        .await?
+        .body()
+        .deserialize()
+}
+
+async fn refresh_player(connection: &Connection, player: &mut Player, identity: bool) {
+    // Bind reads to the unique owner, never a name that can change mid-query.
+    player.playing = property(connection, &player.owner, PLAYER, "PlaybackStatus")
+        .await
+        .ok()
+        .and_then(|value| String::try_from(value).ok())
+        .is_some_and(|status| status == "Playing");
+
+    if identity {
+        player.pid = bus_call(connection, "GetConnectionUnixProcessID", &player.owner)
+            .await
+            .ok();
+        player.desktop_entry = property(connection, &player.owner, PREFIX, "DesktopEntry")
+            .await
+            .ok()
+            .and_then(|value| String::try_from(value).ok())
+            .map(|value| crate::window_rules::normalize_app_id(&value))
+            .filter(|value| !value.is_empty());
+    }
+}
+
+fn publish(
+    players: &HashMap<String, Player>,
+    previous: &mut Vec<Player>,
+    send: &mut impl FnMut(Vec<Player>) -> bool,
+) -> bool {
+    let mut snapshot: Vec<_> = players.values().cloned().collect();
+    snapshot.sort_unstable_by(|a, b| a.name.cmp(&b.name));
+    if snapshot == *previous {
+        return true;
+    }
+
+    *previous = snapshot.clone();
+    send(snapshot)
+}
+
+async fn monitor(connection: Connection, mut send: impl FnMut(Vec<Player>) -> bool) -> zbus::Result<()> {
+    // Subscribe before discovery so startup and owner replacement cannot lose
+    // a pause/stop event. Ignore unrelated property traffic such as position.
+    let properties = MatchRule::builder()
+        .msg_type(zbus::message::Type::Signal)
+        .path(PATH)?
+        .interface(PROPERTIES)?
+        .member("PropertiesChanged")?
+        .build();
+    let owners = MatchRule::builder()
+        .msg_type(zbus::message::Type::Signal)
+        .sender("org.freedesktop.DBus")?
+        .interface("org.freedesktop.DBus")?
+        .member("NameOwnerChanged")?
+        .arg0ns(PREFIX)?
+        .build();
+    let properties = MessageStream::for_match_rule(properties, &connection, Some(128)).await?;
+    let owners = MessageStream::for_match_rule(owners, &connection, Some(128)).await?;
+    let mut signals = stream::or(properties, owners);
+    let mut players = HashMap::new();
+    let mut previous = Vec::new();
+    let names: Vec<String> = connection
+        .call_method(
+            Some("org.freedesktop.DBus"),
+            "/org/freedesktop/DBus",
+            Some("org.freedesktop.DBus"),
+            "ListNames",
+            &(),
+        )
+        .await?
+        .body()
+        .deserialize()?;
+    let mut names: Vec<_> = names
+        .into_iter()
+        .filter(|name| name.strip_prefix(PREFIX).is_some_and(|suffix| suffix.starts_with('.')))
+        .collect();
+    names.sort_unstable();
+    for name in names.into_iter().take(MAX_PLAYERS) {
+        if let Ok(owner) = bus_call(&connection, "GetNameOwner", &name).await {
+            let mut player = Player {
+                name: name.clone(),
+                owner,
+                pid: None,
+                desktop_entry: None,
+                playing: false,
+            };
+            refresh_player(&connection, &mut player, true).await;
+            players.insert(name, player);
+        }
+    }
+
+    if !publish(&players, &mut previous, &mut send) {
+        return Ok(());
+    }
+    while let Some(message) = signals.next().await {
+        let message = message?;
+        let header = message.header();
+        if header
+            .member()
+            .is_some_and(|member| member.as_str() == "NameOwnerChanged")
+        {
+            let (name, _, owner): (String, String, String) = message.body().deserialize()?;
+            // Remove the old owner's state before looking up the replacement.
+            players.remove(&name);
+            if !publish(&players, &mut previous, &mut send) {
+                return Ok(());
+            }
+
+            if !owner.is_empty() && players.len() < MAX_PLAYERS {
+                let mut player = Player {
+                    name: name.clone(),
+                    owner,
+                    pid: None,
+                    desktop_entry: None,
+                    playing: false,
+                };
+                refresh_player(&connection, &mut player, true).await;
+                players.insert(name, player);
+            }
+        } else {
+            let Ok((interface, changed, invalidated)) =
+                message
+                    .body()
+                    .deserialize::<(String, HashMap<String, OwnedValue>, Vec<String>)>()
+            else {
+                continue;
+            };
+            let identity = interface == PREFIX
+                && (changed.contains_key("DesktopEntry") || invalidated.iter().any(|field| field == "DesktopEntry"));
+            let status = interface == PLAYER
+                && (changed.contains_key("PlaybackStatus")
+                    || invalidated.iter().any(|field| field == "PlaybackStatus"));
+            if !identity && !status {
+                continue;
+            }
+
+            let Some(owner) = header.sender() else {
+                continue;
+            };
+            for player in players.values_mut().filter(|player| player.owner == owner.as_str()) {
+                // Re-read current state: a signal queued during discovery may
+                // describe older playback than the startup snapshot.
+                refresh_player(&connection, player, identity).await;
+            }
+        }
+
+        if !publish(&players, &mut previous, &mut send) {
+            return Ok(());
+        }
+    }
+
+    Err(zbus::Error::Failure("MPRIS signal connection ended".into()))
+}
+
+pub(crate) fn init(event_loop: &mut EventLoop<Ferese>) -> Result<(), Box<dyn std::error::Error>> {
+    let (sender, receiver) = channel();
+    event_loop.handle().insert_source(receiver, |event, _, state| {
+        if let Event::Msg(players) = event {
+            state.media_players = players;
+            state.refresh_idle_inhibition();
+        }
+    })?;
+
+    std::thread::Builder::new()
+        .name("ferese-playback".into())
+        .spawn(move || {
+            let mut had_players = false;
+            loop {
+                let result = future::block_on(async {
+                    let connection = zbus::connection::Builder::session()?
+                        .method_timeout(Duration::from_millis(500))
+                        .build()
+                        .await?;
+                    monitor(connection, |players| {
+                        had_players = !players.is_empty();
+                        sender.send(players).is_ok()
+                    })
+                    .await
+                });
+                match result {
+                    Ok(()) => break,
+                    Err(error) => {
+                        tracing::debug!(%error, "playback monitor disconnected; releasing automatic inhibition")
+                    }
+                }
+
+                if had_players && sender.send(Vec::new()).is_err() {
+                    break;
+                }
+                had_players = false;
+                // Reconnect only after failure; healthy operation sleeps on signals.
+                std::thread::sleep(Duration::from_secs(5));
+            }
+        })?;
+    Ok(())
+}

compositor/src/ipc.rs

@@ -692,6 +692,17 @@ impl Ferese {
             "close" => self.close_focused_window(),
             "get-focused-window" => return Ok(self.focused_window_json()),
             "get-windows" => return Ok(self.windows_json()),
+            "get-idle-inhibition" => {
+                return Ok(json!({
+                    "inhibited": self.idle_notifier_state.is_inhibited(),
+                    "automatic": self.automatic_idle_inhibited,
+                    "fullscreen-playback": self.idle_inhibit.fullscreen_playback,
+                    "portal": self.portal_session.idle_inhibited(),
+                    "players": self.media_players.iter().map(|player| json!({
+                        "name": player.name, "desktop-entry": player.desktop_entry, "playing": player.playing,
+                    })).collect::<Vec<_>>(),
+                }));
+            }
             "get-keybindings" => {
                 let map = crate::config::physical_keymap(&self.input_settings).ok();
                 return Ok(json!(

compositor/src/main.rs

@@ -12,6 +12,7 @@ mod frame_scheduler;
 mod gestures;
 mod grabs;
 mod handlers;
+mod idle_inhibition;
 mod input;
 mod input_capture;
 mod ipc;
@@ -109,6 +110,7 @@ fn main() -> Result<(), Box<dyn Error>> {
         });
     theme::init(&mut event_loop, &mut state, candidate)?;
     resume::init(&mut event_loop)?;
+    idle_inhibition::media::init(&mut event_loop)?;
     overview::init_font_loader(&mut event_loop, &mut state)?;
     backends::init(launch.backend, &mut event_loop, &mut state)?;
     info!(socket = ?state.socket_name, backend = ?launch.backend, "Ferese is accepting Wayland clients");

compositor/src/portal_session.rs

@@ -116,7 +116,7 @@ impl PortalSession {
         }
     }
 
-    fn idle_inhibited(&self) -> bool {
+    pub(crate) fn idle_inhibited(&self) -> bool {
         self.inhibitors.values().any(|inhibitor| inhibitor.flags & 8 != 0)
     }
 
@@ -234,21 +234,6 @@ impl PortalSession {
 }
 
 impl crate::Ferese {
-    pub(crate) fn refresh_idle_inhibition(&mut self) {
-        let eligible = if self.idle_inhibitors.is_empty() {
-            Default::default()
-        } else {
-            self.callback_outputs()
-        };
-
-        self.idle_notifier_state.set_is_inhibited(
-            self.idle_inhibitors
-                .keys()
-                .any(|surface| eligible.contains_key(&surface.into()))
-                || self.portal_session.idle_inhibited(),
-        );
-    }
-
     pub(crate) fn end_portal_session(&mut self) {
         let token = self.portal_session.query.as_ref().map(|query| query.token);
         let result =

compositor/src/state.rs

@@ -443,7 +443,7 @@ pub struct Ferese {
     pub(crate) input_settings: InputSettings,
     pub(crate) bindings: BindingSet,
     workspace_auto_back_and_forth: bool,
-    window_rules: Vec<WindowRule>,
+    pub(crate) window_rules: Vec<WindowRule>,
     pub(crate) theme_settings: ThemeSettings,
     pub(crate) inactive_dim: crate::config::InactiveDimSettings,
     animations_enabled: bool,
@@ -464,6 +464,9 @@ pub struct Ferese {
     pub intercepted_keys: HashSet<Keycode>,
     pub(crate) swipe: Swipe,
     pub idle_inhibitors: HashMap<WlSurface, usize>,
+    pub(crate) idle_inhibit: crate::idle_inhibition::Settings,
+    pub(crate) media_players: Vec<crate::idle_inhibition::media::Player>,
+    pub(crate) automatic_idle_inhibited: bool,
     pub active_shortcuts_inhibitor: Option<KeyboardShortcutsInhibitor>,
     pub direct_backend: Option<DirectBackendState>,
     _ipc_socket: Option<IpcSocketGuard>,
@@ -517,6 +520,7 @@ pub struct Ferese {
 #[derive(Clone)]
 pub struct RuntimeConfig {
     pub(crate) lock_idle: IdleSettings,
+    pub(crate) idle_inhibit: crate::idle_inhibition::Settings,
     pub(crate) autostart: Vec<DaemonConfig>,
     pub(crate) overview_font_family: String,
     pub(crate) wallpaper: WallpaperConfig,
@@ -701,6 +705,9 @@ impl Ferese {
             intercepted_keys: HashSet::new(),
             swipe: Swipe::default(),
             idle_inhibitors: HashMap::new(),
+            idle_inhibit: config.idle_inhibit,
+            media_players: Vec::new(),
+            automatic_idle_inhibited: false,
             active_shortcuts_inhibitor: None,
             direct_backend: None,
             _ipc_socket: None,
@@ -852,6 +859,8 @@ impl Ferese {
             self.portal_shortcuts.reconcile(&self.bindings, &self.input_settings);
         }
         let old_rules = std::mem::replace(&mut self.window_rules, config.window_rules);
+        let idle_policy_changed = self.idle_inhibit != config.idle_inhibit || old_rules != self.window_rules;
+        self.idle_inhibit = config.idle_inhibit;
         self.theme_settings = config.theme_settings;
         self.inactive_dim = config.inactive_dim;
         self.column_width_presets = config.column_width_presets;
@@ -885,6 +894,10 @@ impl Ferese {
             self.reapply_window_rules(&old_rules);
         }
 
+        if idle_policy_changed {
+            self.refresh_idle_inhibition();
+        }
+
         self.overview.set_font_family(config.overview_font_family);
         if self.wallpaper.configuration() != &config.wallpaper {
             self.wallpaper.reload(config.wallpaper);

compositor/src/window_rules.rs

@@ -11,6 +11,7 @@ pub(crate) struct WindowRuleConfig {
     pub height: Option<f64>,
     pub fullscreen: Option<bool>,
     pub block_out_from_screencasts: Option<bool>,
+    pub idle_inhibit: Option<crate::idle_inhibition::Mode>,
 }
 
 #[derive(Clone, Debug, PartialEq)]
@@ -24,6 +25,13 @@ pub struct WindowRule {
     height: Option<f64>,
     fullscreen: Option<bool>,
     block_out_from_screencasts: Option<bool>,
+    idle_inhibit: Option<crate::idle_inhibition::Mode>,
+}
+
+impl WindowRule {
+    pub(crate) fn idle_policy(&self) -> Option<crate::idle_inhibition::Mode> {
+        self.idle_inhibit
+    }
 }
 
 #[derive(Clone, Copy, Debug, Default, PartialEq)]
@@ -34,6 +42,7 @@ pub struct WindowRuleResult {
     pub height: Option<f64>,
     pub fullscreen: Option<bool>,
     pub block_out_from_screencasts: Option<bool>,
+    pub idle_inhibit: Option<crate::idle_inhibition::Mode>,
 }
 
 /// Only changed matches should override an existing window's manual state.
@@ -42,9 +51,11 @@ pub(crate) fn live_result(
     mut new: WindowRuleResult,
     transient: bool,
 ) -> Option<WindowRuleResult> {
-    // Capture policy is resolved independently of placement at capture time.
+    // Capture and idle policies are reevaluated without changing placement.
     old.block_out_from_screencasts = None;
     new.block_out_from_screencasts = None;
+    old.idle_inhibit = None;
+    new.idle_inhibit = None;
     if old == new {
         return None;
     }
@@ -97,6 +108,7 @@ pub fn resolve(rules: &[WindowRule], app_id: Option<&str>, title: Option<&str>,
         result.height = rule.height.or(result.height);
         result.fullscreen = rule.fullscreen.or(result.fullscreen);
         result.block_out_from_screencasts = rule.block_out_from_screencasts.or(result.block_out_from_screencasts);
+        result.idle_inhibit = rule.idle_inhibit.or(result.idle_inhibit);
     }
 
     result
@@ -137,6 +149,7 @@ fn validate_rule(index: usize, rule: &WindowRuleConfig) -> Result<WindowRule, St
         height,
         fullscreen: rule.fullscreen,
         block_out_from_screencasts: rule.block_out_from_screencasts,
+        idle_inhibit: rule.idle_inhibit,
     })
 }
 
@@ -171,7 +184,7 @@ pub(crate) fn is_native_dialog(app_id: Option<&str>) -> bool {
     )
 }
 
-fn normalize_app_id(value: &str) -> String {
+pub(crate) fn normalize_app_id(value: &str) -> String {
     value
         .trim()
         .strip_suffix(".desktop")
@@ -215,6 +228,7 @@ mod tests {
             height: None,
             fullscreen: None,
             block_out_from_screencasts: None,
+            idle_inhibit: None,
         }
     }
 
@@ -346,6 +360,7 @@ mod tests {
             height: None,
             fullscreen: None,
             block_out_from_screencasts: None,
+            idle_inhibit: None,
         };
         let invalid_size = WindowRuleConfig {
             width: Some(f64::NAN),