Implement native inhibition and acknowledged session-ending confirmation

portal/src/backend.rs

@@ -670,6 +670,7 @@ pub async fn run() -> Result<(), Box<dyn std::error::Error>> {
     let background = crate::permissions::Background::new(requests.clone());
     let lockdown = crate::lockdown::Lockdown::new();
     let shortcuts = crate::shortcuts::GlobalShortcuts::new(requests.clone());
+    let inhibit = crate::inhibit::Inhibit::default();
     let connection = zbus::connection::Builder::session()?
         .name("org.freedesktop.impl.portal.desktop.ferese")?
         .serve_at(PATH, backend.clone())?
@@ -680,6 +681,7 @@ pub async fn run() -> Result<(), Box<dyn std::error::Error>> {
         .serve_at(PATH, background.clone())?
         .serve_at(PATH, lockdown.clone())?
         .serve_at(PATH, shortcuts.clone())?
+        .serve_at(PATH, inhibit.clone())?
         .serve_at(
             "/org/ferese/ScreenRecorder",
             RecorderControl(backend.clone()),
@@ -689,6 +691,8 @@ pub async fn run() -> Result<(), Box<dyn std::error::Error>> {
     tokio::spawn(settings.watch(connection.clone()));
     tokio::spawn(background.watch(connection.clone()));
     tokio::spawn(lockdown.watch(connection.clone()));
+    tokio::spawn(inhibit.clone().watch(connection.clone()));
+    tokio::spawn(inhibit.clone().watch_logind());
     // Frontend death must revoke every stream, even if Session.Close never arrives.
     loop {
         tokio::time::sleep(Duration::from_secs(1)).await;
@@ -702,6 +706,7 @@ pub async fn run() -> Result<(), Box<dyn std::error::Error>> {
         };
         requests.revoke_stale(owner.as_deref()).await;
         shortcuts.revoke_stale(&connection, owner.as_deref()).await;
+        inhibit.revoke_stale(&connection, owner.as_deref()).await;
         let stale: Vec<_> = backend
             .sessions
             .lock()