Extract PowerSearchStringTerm

Summary: Project doc: https://docs.google.com/document/d/1miofxds9DJgWScj0zFyBbdpRH5Rj0T9FqiCapof5-vU

Reviewed By: lblasa

Differential Revision: D48601912

fbshipit-source-id: 90f67f1ea19ef6ae8b5d92f26894af2ab20fa821

desktop/flipper-plugin/src/ui/PowerSearch/PowerSearchStringTerm.tsx

@@ -0,0 +1,44 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {Input} from 'antd';
+import React from 'react';
+
+type PowerSearchStringTermProps = {
+  onCancel: () => void;
+  onChange: (value: string) => void;
+};
+
+export const PowerSearchStringTerm: React.FC<PowerSearchStringTermProps> = ({
+  onCancel,
+  onChange,
+}) => {
+  return (
+    <Input
+      autoFocus
+      style={{width: 100}}
+      placeholder="..."
+      onBlur={(event) => {
+        const newValue = event.target.value;
+
+        if (!newValue) {
+          onCancel();
+          return;
+        }
+
+        onChange(newValue);
+      }}
+      onKeyDown={(event) => {
+        if (event.key === 'Enter' || event.key === 'Escape') {
+          event.currentTarget.blur();
+        }
+      }}
+    />
+  );
+};

desktop/flipper-plugin/src/ui/PowerSearch/PowerSearchTerm.tsx

@@ -8,9 +8,10 @@
  */
 
 import {CloseOutlined} from '@ant-design/icons';
-import {Button, Input, Space} from 'antd';
+import {Button, Space} from 'antd';
 import * as React from 'react';
 import {FieldConfig, OperatorConfig} from './PowerSearchConfig';
+import {PowerSearchStringTerm} from './PowerSearchStringTerm';
 
 export type IncompleteSearchExpressionTerm = {
   field: FieldConfig;
@@ -39,29 +40,14 @@ export const PowerSearchTerm: React.FC<PowerSearchTermProps> = ({
       {searchValueRenderer === 'button' ? (
         <Button>{searchTerm.searchValue ?? '...'}</Button>
       ) : (
-        // TODO: Fix width
-        <Input
-          autoFocus
-          style={{width: 100}}
-          placeholder="..."
-          onBlur={(event) => {
-            const newValue = event.target.value;
-
-            if (!newValue) {
-              onCancel();
-              return;
-            }
-
+        <PowerSearchStringTerm
+          onCancel={onCancel}
+          onChange={(newValue) => {
             onFinalize({
               ...searchTerm,
               searchValue: newValue,
             });
           }}
-          onKeyDown={(event) => {
-            if (event.key === 'Enter' || event.key === 'Escape') {
-              event.currentTarget.blur();
-            }
-          }}
         />
       )}
       <Button