autocommit 2022-02-21 23:21:13 CET

src/ifs/wl_seat/kb_owner.rs

@@ -0,0 +1,85 @@
+use std::rc::Rc;
+use crate::CloneCell;
+use crate::ifs::wl_seat::WlSeatGlobal;
+use crate::tree::Node;
+
+pub struct KbOwnerHolder {
+    default: Rc<DefaultKbOwner>,
+    owner: CloneCell<Rc<dyn KbOwner>>,
+}
+
+impl Default for KbOwnerHolder {
+    fn default() -> Self {
+        Self {
+            default: Rc::new(DefaultKbOwner),
+            owner: CloneCell::new(Rc::new(DefaultKbOwner)),
+        }
+    }
+}
+
+impl KbOwnerHolder {
+    pub fn grab(&self, seat: &Rc<WlSeatGlobal>, node: Rc<dyn Node>) -> bool {
+        self.owner.get().grab(seat, node)
+    }
+
+    pub fn ungrab(&self, seat: &Rc<WlSeatGlobal>) {
+        self.owner.get().ungrab(seat)
+    }
+
+    pub fn set_kb_node(&self, seat: &Rc<WlSeatGlobal>, node: Rc<dyn Node>) {
+        self.owner.get().set_kb_node(seat, node);
+    }
+}
+
+struct DefaultKbOwner;
+
+struct GrabKbOwner;
+
+trait KbOwner {
+    fn grab(&self, seat: &Rc<WlSeatGlobal>, node: Rc<dyn Node>) -> bool;
+    fn ungrab(&self, seat: &Rc<WlSeatGlobal>);
+    fn set_kb_node(&self, seat: &Rc<WlSeatGlobal>, node: Rc<dyn Node>);
+}
+
+impl KbOwner for DefaultKbOwner {
+    fn grab(&self, seat: &Rc<WlSeatGlobal>, node: Rc<dyn Node>) -> bool {
+        self.set_kb_node(seat, node);
+        seat.kb_owner.owner.set(Rc::new(GrabKbOwner));
+        true
+    }
+
+    fn ungrab(&self, _seat: &Rc<WlSeatGlobal>) {
+        // nothing
+    }
+
+    fn set_kb_node(&self, seat: &Rc<WlSeatGlobal>, node: Rc<dyn Node>) {
+        let old = seat.keyboard_node.get();
+        if old.id() == node.id() {
+            return;
+        }
+        old.unfocus(seat);
+        if old.seat_state().unfocus(seat) {
+            old.active_changed(false);
+        }
+
+        if node.seat_state().focus(seat) {
+            node.active_changed(true);
+        }
+        node.clone().focus(seat);
+        seat.keyboard_node.set(node.clone());
+    }
+}
+
+impl KbOwner for GrabKbOwner {
+    fn grab(&self, _seat: &Rc<WlSeatGlobal>, _node: Rc<dyn Node>) -> bool {
+        false
+    }
+
+    fn ungrab(&self, seat: &Rc<WlSeatGlobal>) {
+        seat.kb_owner.owner.set(seat.kb_owner.default.clone());
+    }
+
+    fn set_kb_node(&self, _seat: &Rc<WlSeatGlobal>, _node: Rc<dyn Node>) {
+        // nothing
+    }
+}