AdHocFilters: Fix matching non-latin template vars in filter

packages/scenes/src/variables/adhoc/AdHocFiltersCombobox/AdHocFiltersCombobox.tsx

@@ -25,7 +25,7 @@ import {
 import {
   ERROR_STATE_DROPDOWN_WIDTH,
   flattenOptionGroups,
-  fuzzySearchOptions,
+  searchOptions,
   generateFilterUpdatePayload,
   generatePlaceholder,
   populateInputValueOnInputTypeSwitch,
@@ -81,7 +81,7 @@ export const AdHocCombobox = forwardRef(function AdHocCombobox(
   const disabledIndicesRef = useRef<number[]>([]);
   const filterInputTypeRef = useRef<AdHocInputType>(!isAlwaysWip ? 'value' : 'key');
 
-  const optionsSearcher = useMemo(() => fuzzySearchOptions(options), [options]);
+  const optionsSearcher = useMemo(() => searchOptions(options), [options]);
 
   const isLastFilter = useMemo(() => {
     if (isAlwaysWip) {

packages/scenes/src/variables/adhoc/AdHocFiltersCombobox/utils.ts

@@ -11,11 +11,19 @@ export const VIRTUAL_LIST_ITEM_HEIGHT = 38;
 export const VIRTUAL_LIST_ITEM_HEIGHT_WITH_DESCRIPTION = 60;
 export const ERROR_STATE_DROPDOWN_WIDTH = 366;
 
-export function fuzzySearchOptions(options: Array<SelectableValue<string>>) {
+// https://catonmat.net/my-favorite-regex :)
+const REGEXP_NON_ASCII = /[^ -~]/m;
+
+export function searchOptions(options: Array<SelectableValue<string>>) {
   const haystack = options.map((o) => o.label ?? o.value!);
   const fuzzySearch = getFuzzySearcher(haystack);
 
   return (search: string, filterInputType: AdHocInputType) => {
+    // fall back to substring matching for non-latin chars
+    if (REGEXP_NON_ASCII.test(search)) {
+      return options.filter((o) => o.label?.includes(search) || o.value?.includes(search) || false);
+    }
+
     if (filterInputType === 'operator' && search !== '') {
       // uFuzzy can only match non-alphanum chars if quoted
       search = `"${search}"`;

packages/scenes/src/variables/utils.test.ts

@@ -8,6 +8,8 @@ import { getFuzzySearcher, getQueriesForVariables } from './utils';
 import { SceneVariableSet } from './sets/SceneVariableSet';
 import { DataSourceVariable } from './variants/DataSourceVariable';
 import { GetDataSourceListFilters } from '@grafana/runtime';
+import { searchOptions } from './adhoc/AdHocFiltersCombobox/utils';
+import { SelectableValue } from '@grafana/data';
 
 describe('getQueriesForVariables', () => {
   it('should resolve queries', () => {
@@ -289,6 +291,24 @@ describe('getFuzzySearcher orders by match quality with case-sensitivity', () =>
   });
 });
 
+describe('searchOptions falls back to substring matching for non-latin needles', () => {
+  it('Can filter options by search query', async () => {
+    const options: SelectableValue[] = [
+      '台灣省',
+      '台中市',
+      '台北市',
+      '台南市',
+      '南投縣',
+      '高雄市',
+      '台中第一高級中學',
+    ].map((v) => ({ label: v, value: v }));
+
+    const searcher = searchOptions(options);
+
+    expect(searcher('南', 'key').map((o) => o.label!)).toEqual(['台南市', '南投縣']);
+  });
+});
+
 interface TestObjectState extends SceneObjectState {
   datasource: DataSourceRef | null;
 }