feat: add notification timeout manager

widgets/notifications/manager.ts

@@ -0,0 +1,50 @@
+import GLib from "gi://GLib";
+
+type TimeoutManager = {
+  setupTimeout: () => void;
+  clearTimeout: () => void;
+  handleHover: () => void;
+  handleHoverLost: () => void;
+  cleanup: () => void;
+};
+
+export const createTimeoutManager = (
+  dismissCallback: () => void,
+  timeoutDelay: number,
+): TimeoutManager => {
+  let isHovered = false;
+  let timeoutId: number | null = null;
+
+  const clearTimeout = () => {
+    if (timeoutId !== null) {
+      GLib.source_remove(timeoutId);
+      timeoutId = null;
+    }
+  };
+
+  const setupTimeout = () => {
+    clearTimeout();
+
+    if (!isHovered) {
+      timeoutId = GLib.timeout_add(GLib.PRIORITY_DEFAULT, timeoutDelay, () => {
+        clearTimeout();
+        dismissCallback();
+        return GLib.SOURCE_REMOVE;
+      });
+    }
+  };
+
+  return {
+    setupTimeout,
+    clearTimeout,
+    handleHover: () => {
+      isHovered = true;
+      clearTimeout();
+    },
+    handleHoverLost: () => {
+      isHovered = false;
+      setupTimeout();
+    },
+    cleanup: clearTimeout,
+  };
+};