Wire screen focus requests through IPC

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

wayvr/src/backend/task.rs

@@ -85,6 +85,15 @@ pub struct ModifyPanelTask {
     pub command: ModifyPanelCommand,
 }
 
+#[derive(Debug, Clone)]
+pub struct ScreenFocusTask {
+    pub screen_name: String,
+    pub target_x: f32,
+    pub target_y: f32,
+    pub crop_rect: Option<[f32; 4]>,
+    pub refresh_only: bool,
+}
+
 pub enum ToggleMode {
     EnsureOn,
     EnsureOff,
@@ -110,6 +119,7 @@ pub enum OverlayTask {
     Create(OverlaySelector, Box<CreateOverlayTask>),
     ModifyPanel(ModifyPanelTask),
     Drop(OverlaySelector),
+    ScreenFocusToggle(ScreenFocusTask),
 }
 
 #[allow(dead_code)]

wayvr/src/ipc/events.rs

@@ -58,6 +58,12 @@ where
                 app.tasks
                     .enqueue(TaskType::Overlay(OverlayTask::ModifyPanel(custom_task)));
             }
+            WayVRSignal::ScreenFocusToggle(screen_focus) => {
+                app.tasks
+                    .enqueue(TaskType::Overlay(OverlayTask::ScreenFocusToggle(
+                        screen_focus,
+                    )));
+            }
         }
     }
 

wayvr/src/ipc/ipc_server.rs

@@ -382,6 +382,21 @@ impl Connection {
             }));
     }
 
+    fn handle_wlx_screen_focus_toggle(
+        params: &mut TickParams,
+        screen_focus: packet_client::WlxScreenFocusToggleParams,
+    ) {
+        params.signals.send(WayVRSignal::ScreenFocusToggle(
+            crate::backend::task::ScreenFocusTask {
+                screen_name: screen_focus.screen_name,
+                target_x: screen_focus.target_x.clamp(0.0, 1.0),
+                target_y: screen_focus.target_y.clamp(0.0, 1.0),
+                crop_rect: screen_focus.crop_rect.map(sanitize_crop_rect),
+                refresh_only: screen_focus.refresh_only,
+            },
+        ));
+    }
+
     // FIXME: we should probably respond an error to the client in case if wayland server feature is disabled
     //        fix this after we're done with the webkit-based wayvr-dashboard
     #[allow(unused_variables)]
@@ -404,6 +419,9 @@ impl Connection {
             PacketClient::WvrWindowSetVisible(window_handle, visible) => {
                 Self::handle_wvr_window_set_visible(params, window_handle, visible);
             }
+            PacketClient::WlxScreenFocusToggle(screen_focus) => {
+                Self::handle_wlx_screen_focus_toggle(params, screen_focus);
+            }
             PacketClient::WvrProcessGet(serial, process_handle) => {
                 self.handle_wvr_process_get(params, serial, process_handle)?;
             }
@@ -496,6 +514,56 @@ impl Connection {
     }
 }
 
+fn sanitize_crop_rect(crop_rect: [f32; 4]) -> [f32; 4] {
+    let raw_w = if crop_rect[2].is_finite() {
+        crop_rect[2].clamp(0.01, 1.0)
+    } else {
+        1.0
+    };
+    let raw_h = if crop_rect[3].is_finite() {
+        crop_rect[3].clamp(0.01, 1.0)
+    } else {
+        1.0
+    };
+
+    let x = if crop_rect[0].is_finite() {
+        crop_rect[0].clamp(0.0, 1.0 - raw_w)
+    } else {
+        0.0
+    };
+    let y = if crop_rect[1].is_finite() {
+        crop_rect[1].clamp(0.0, 1.0 - raw_h)
+    } else {
+        0.0
+    };
+
+    let w = raw_w.min(1.0 - x).max(0.01);
+    let h = raw_h.min(1.0 - y).max(0.01);
+    [x, y, w, h]
+}
+
+#[cfg(test)]
+mod tests {
+    use super::sanitize_crop_rect;
+
+    #[test]
+    fn sanitize_crop_rect_prevents_edge_panic() {
+        let crop = sanitize_crop_rect([1.0, 1.0, 0.02, 0.02]);
+        assert!((crop[0] - 0.98).abs() < 0.0001);
+        assert!((crop[1] - 0.98).abs() < 0.0001);
+        assert!((crop[2] - 0.02).abs() < 0.0001);
+        assert!((crop[3] - 0.02).abs() < 0.0001);
+    }
+
+    #[test]
+    fn sanitize_crop_rect_handles_non_finite_values() {
+        assert_eq!(
+            sanitize_crop_rect([f32::NAN, f32::INFINITY, f32::NAN, -1.0]),
+            [0.0, 0.0, 1.0, 0.01]
+        );
+    }
+}
+
 impl Drop for Connection {
     fn drop(&mut self) {
         log::info!("Connection closed");

wayvr/src/ipc/signal.rs

@@ -5,4 +5,5 @@ pub enum WayVRSignal {
     SwitchSet(Option<usize>),
     ShowHide,
     CustomTask(crate::backend::task::ModifyPanelTask),
+    ScreenFocusToggle(crate::backend::task::ScreenFocusTask),
 }