[EuiSelectable] Handle more keyboard scenarios

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## [`main`](https://github.com/elastic/eui/tree/main)
 
 - Refactored `EuiSuggest` to use `EuiSelectable` ([#5157](https://github.com/elastic/eui/pull/5157))
+- Improved `EuiSelectable` keypress scenarios ([#5613](https://github.com/elastic/eui/pull/5613))
 
 **Bug fixes**
 

src/components/form/field_search/field_search.tsx

@@ -247,7 +247,7 @@ export class EuiFieldSearch extends Component<
         isLoading={isLoading}
         clear={
           isClearable && value && !rest.readOnly && !rest.disabled
-            ? { onClick: this.onClear }
+            ? { onClick: this.onClear, 'data-test-subj': 'clearSearchButton' }
             : undefined
         }
         compressed={compressed}

src/components/selectable/selectable.spec.tsx

@@ -0,0 +1,103 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import React from 'react';
+
+import { EuiSelectable, EuiSelectableProps } from './selectable';
+
+const options: EuiSelectableProps['options'] = [
+  {
+    label: 'Titan',
+    'data-test-subj': 'titanOption',
+  },
+  {
+    label: 'Enceladus',
+  },
+  {
+    label:
+      "Pandora is one of Saturn's moons, named for a Titaness of Greek mythology",
+  },
+];
+
+describe('EuiSelectable', () => {
+  describe('with a `searchable` configuration', () => {
+    it('filters the list with search', () => {
+      cy.realMount(
+        <EuiSelectable searchable options={options}>
+          {(list, search) => (
+            <>
+              {search}
+              {list}
+            </>
+          )}
+        </EuiSelectable>
+      );
+
+      // Focus the second option
+      cy.get('input')
+        .click()
+        .type('{downarrow}')
+        .type('{downarrow}')
+        .then(() => {
+          cy.get('li[role=option]')
+            .eq(1)
+            .should('have.attr', 'aria-selected', 'true');
+        });
+
+      // Focus remains on the second option
+      cy.get('input')
+        .type('{alt}')
+        .type('{ctrl}')
+        .type('{meta}')
+        .type('{Shift}')
+        .then(() => {
+          cy.get('li[role=option]')
+            .eq(1)
+            .should('have.attr', 'aria-selected', 'true');
+        });
+
+      // Filter the list
+      cy.get('input')
+        .type('enc')
+        .then(() => {
+          cy.get('li[role=option]')
+            .first()
+            .should('have.attr', 'title', 'Enceladus');
+        });
+    });
+
+    it('can clear the input', () => {
+      cy.mount(
+        <EuiSelectable searchable options={options}>
+          {(list, search) => (
+            <>
+              {search}
+              {list}
+            </>
+          )}
+        </EuiSelectable>
+      );
+
+      cy.get('input')
+        .type('enc')
+        .then(() => {
+          cy.get('li[role=option]')
+            .first()
+            .should('have.attr', 'title', 'Enceladus');
+        });
+
+      cy.get('[data-test-subj="clearSearchButton"]')
+        .type('{enter}')
+        .then(() => {
+          cy.get('li[role=option]')
+            .first()
+            .should('have.attr', 'title', 'Titan');
+        });
+    });
+  });
+});

src/components/selectable/selectable.tsx

@@ -180,6 +180,7 @@ export class EuiSelectable<T = {}> extends Component<
     searchable: false,
     isPreFiltered: false,
   };
+  private inputRef: HTMLInputElement | null = null;
   private containerRef = createRef<HTMLDivElement>();
   private optionsListRef = createRef<EuiSelectableList<T>>();
   private preventOnFocus = false;
@@ -312,6 +313,12 @@ export class EuiSelectable<T = {}> extends Component<
           // via the input box, and as such only ENTER will toggle selection.
           return;
         }
+        if (event.target !== this.inputRef) {
+          // The captured event is not derived from the searchbox.
+          // The user is attempting to interact with an internal button,
+          // such as the clear button, and the event should not be altered.
+          return;
+        }
         event.preventDefault();
         event.stopPropagation();
         if (this.state.activeOptionIndex != null && optionsList) {
@@ -321,6 +328,12 @@ export class EuiSelectable<T = {}> extends Component<
         }
         break;
 
+      case keys.ALT:
+      case keys.SHIFT:
+      case keys.CTRL:
+      case keys.META:
+        break;
+
       default:
         this.setState({ activeOptionIndex: undefined }, this.onFocus);
         break;
@@ -631,6 +644,7 @@ export class EuiSelectable<T = {}> extends Component<
             aria-activedescendant={this.makeOptionId(activeOptionIndex)} // the current faux-focused option
             placeholder={placeholderName}
             isPreFiltered={isPreFiltered ?? false}
+            inputRef={(node) => (this.inputRef = node)}
             {...(searchHasAccessibleName
               ? searchAccessibleName
               : { 'aria-label': placeholderName })}

src/components/selectable/selectable_search/__snapshots__/selectable_search.test.tsx.snap

@@ -76,6 +76,7 @@ exports[`EuiSelectableSearch props defaultValue 1`] = `
       <button
         aria-label="Clear input"
         class="euiFormControlLayoutClearButton"
+        data-test-subj="clearSearchButton"
         type="button"
       >
         <span

src/components/suggest/__snapshots__/suggest.test.tsx.snap

@@ -293,6 +293,7 @@ exports[`EuiSuggest props isVirtualized 1`] = `
                         aria-label="aria-label"
                         defaultValue=""
                         fullWidth={true}
+                        inputRef={[Function]}
                         isLoading={false}
                         isPreFiltered={false}
                         key="listSearch"
@@ -340,6 +341,7 @@ exports[`EuiSuggest props isVirtualized 1`] = `
                           defaultValue=""
                           fullWidth={true}
                           incremental={true}
+                          inputRef={[Function]}
                           isClearable={true}
                           isLoading={false}
                           onBlur={[Function]}
@@ -611,6 +613,7 @@ exports[`EuiSuggest props maxHeight 1`] = `
                         aria-label="aria-label"
                         defaultValue=""
                         fullWidth={true}
+                        inputRef={[Function]}
                         isLoading={false}
                         isPreFiltered={false}
                         key="listSearch"
@@ -658,6 +661,7 @@ exports[`EuiSuggest props maxHeight 1`] = `
                           defaultValue=""
                           fullWidth={true}
                           incremental={true}
+                          inputRef={[Function]}
                           isClearable={true}
                           isLoading={false}
                           onBlur={[Function]}

src/services/keys.ts

@@ -13,6 +13,11 @@ export const TAB = 'Tab';
 export const BACKSPACE = 'Backspace';
 export const F2 = 'F2';
 
+export const ALT = 'Alt';
+export const SHIFT = 'Shift';
+export const CTRL = 'Control';
+export const META = 'Meta'; // Windows, Command, Option
+
 export const ARROW_DOWN = 'ArrowDown';
 export const ARROW_UP = 'ArrowUp';
 export const ARROW_LEFT = 'ArrowLeft';
@@ -30,6 +35,10 @@ export enum keys {
   TAB = 'Tab',
   BACKSPACE = 'Backspace',
   F2 = 'F2',
+  ALT = 'Alt',
+  SHIFT = 'Shift',
+  CTRL = 'Control',
+  META = 'Meta', // Windows, Command, Option
   ARROW_DOWN = 'ArrowDown',
   ARROW_UP = 'ArrowUp',
   ARROW_LEFT = 'ArrowLeft',