Handle stdin for prompts using readline for escape character parsing (#1972)

1 files changed, 37 insertions, 0 deletions

diff --git a/packages/cli/src/ui/hooks/useBracketedPaste.ts b/packages/cli/src/ui/hooks/useBracketedPaste.ts
new file mode 100644
index 00000000..ae58be3b
--- /dev/null
+++ b/packages/cli/src/ui/hooks/useBracketedPaste.ts
@@ -0,0 +1,37 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { useEffect } from 'react';
+
+const ENABLE_BRACKETED_PASTE = '\x1b[?2004h';
+const DISABLE_BRACKETED_PASTE = '\x1b[?2004l';
+
+/**
+ * Enables and disables bracketed paste mode in the terminal.
+ *
+ * This hook ensures that bracketed paste mode is enabled when the component
+ * mounts and disabled when it unmounts or when the process exits.
+ */
+export const useBracketedPaste = () => {
+  const cleanup = () => {
+    process.stdout.write(DISABLE_BRACKETED_PASTE);
+  };
+
+  useEffect(() => {
+    process.stdout.write(ENABLE_BRACKETED_PASTE);
+
+    process.on('exit', cleanup);
+    process.on('SIGINT', cleanup);
+    process.on('SIGTERM', cleanup);
+
+    return () => {
+      cleanup();
+      process.removeListener('exit', cleanup);
+      process.removeListener('SIGINT', cleanup);
+      process.removeListener('SIGTERM', cleanup);
+    };
+  }, []);
+};