config: add on_idle

jay-config/src/_private/client.rs

@@ -45,6 +45,7 @@ pub(crate) struct Client {
     on_new_connector: RefCell<Option<Rc<dyn Fn(Connector)>>>,
     on_new_drm_device: RefCell<Option<Rc<dyn Fn(DrmDevice)>>>,
     on_del_drm_device: RefCell<Option<Rc<dyn Fn(DrmDevice)>>>,
+    on_idle: RefCell<Option<Rc<dyn Fn()>>>,
     bufs: RefCell<Vec<Vec<u8>>>,
     reload: Cell<bool>,
 }
@@ -131,6 +132,7 @@ pub unsafe extern "C" fn init(
         on_new_connector: Default::default(),
         on_new_drm_device: Default::default(),
         on_del_drm_device: Default::default(),
+        on_idle: Default::default(),
         bufs: Default::default(),
         reload: Cell::new(false),
     });
@@ -532,6 +534,10 @@ impl Client {
         *self.on_new_connector.borrow_mut() = Some(Rc::new(f));
     }
 
+    pub fn on_idle<F: Fn() + 'static>(&self, f: F) {
+        *self.on_idle.borrow_mut() = Some(Rc::new(f));
+    }
+
     pub fn on_connector_connected<F: Fn(Connector) + 'static>(&self, f: F) {
         *self.on_connector_connected.borrow_mut() = Some(Rc::new(f));
     }
@@ -718,6 +724,12 @@ impl Client {
                     handler(device);
                 }
             }
+            ServerMessage::Idle => {
+                let handler = self.on_idle.borrow_mut();
+                if let Some(handler) = handler.deref() {
+                    handler();
+                }
+            }
         }
     }
 

jay-config/src/_private/ipc.rs

@@ -54,6 +54,7 @@ pub enum ServerMessage {
     DelDrmDev {
         device: DrmDevice,
     },
+    Idle,
 }
 
 #[derive(Encode, BorrowDecode, Debug)]

jay-config/src/lib.rs

@@ -132,3 +132,8 @@ impl Display for PciId {
         write!(f, "{:04x}:{:04x}", self.vendor, self.model)
     }
 }
+
+/// Sets the callback to be called when the display goes idle.
+pub fn on_idle<F: Fn() + 'static>(f: F) {
+    get!().on_idle(f)
+}