1 files changed, 29 insertions, 0 deletions
diff --git a/src/content/operators/impls/focus.ts b/src/content/operators/impls/focus.ts
new file mode 100644
index 0000000..ea8e27d
--- /dev/null
+++ b/src/content/operators/impls/focus.ts
@@ -0,0 +1,29 @@
+import { inject, injectable } from "tsyringe";
+import Operator from "../Operator";
+import OperatorFactoryChain from "../OperatorFactoryChain";
+import FocusPresenter from "../../presenters/FocusPresenter";
+import * as operations from "../../../shared/operations";
+
+export class FocusOperator implements Operator {
+  constructor(private readonly presenter: FocusPresenter) {}
+
+  async run(): Promise<void> {
+    this.presenter.focusFirstElement();
+  }
+}
+
+@injectable()
+export class FocusOperatorFactoryChain implements OperatorFactoryChain {
+  constructor(
+    @inject("FocusPresenter")
+    private readonly focusPresenter: FocusPresenter
+  ) {}
+
+  create(op: operations.Operation, _repeat: number): Operator | null {
+    switch (op.type) {
+      case operations.FOCUS_INPUT:
+        return new FocusOperator(this.focusPresenter);
+    }
+    return null;
+  }
+}