1 files changed, 30 insertions, 0 deletions
diff --git a/apps/web/src/selection/scope.ts b/apps/web/src/selection/scope.ts
new file mode 100644
index 00000000..22c7710c
--- /dev/null
+++ b/apps/web/src/selection/scope.ts
@@ -0,0 +1,30 @@
+export type ScopeEntry = {
+	hasSelection: () => boolean;
+	clear: () => void;
+	clearActive?: () => void;
+};
+
+let activeScope: ScopeEntry | null = null;
+
+export function activateScope({ entry }: { entry: ScopeEntry }): () => void {
+	if (activeScope && activeScope !== entry) {
+		activeScope.clear();
+	}
+
+	activeScope = entry;
+
+	return () => {
+		if (activeScope === entry) {
+			activeScope = null;
+		}
+	};
+}
+
+export function clearActiveScope(): boolean {
+	if (!activeScope?.hasSelection()) {
+		return false;
+	}
+
+	(activeScope.clearActive ?? activeScope.clear)();
+	return true;
+}