Move RovingTabIndex to shared component and use it in ActionBarView (#33263)

* Create a new shared component and a wrapper in app/web

* Move unit tests and add new for better coverage

* Refactor ActionBarView to use the RovingTabIndexProvider

* Clean up the interface and adjust callers

* Added documentation and renamed type for better readabililty

* Reverting the clean up of IContext

* Fix Sonar issues

* More Sonar issus fixed
This commit is contained in:
rbondesson
2026-04-23 09:33:32 +00:00
committed by GitHub
parent 1a6b0e22a1
commit bb4a7e9613
14 changed files with 1067 additions and 602 deletions
+32 -373
View File
@@ -6,23 +6,21 @@ SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Com
Please see LICENSE files in the repository root for full details. Please see LICENSE files in the repository root for full details.
*/ */
import React, { import React from "react";
createContext, import {
useCallback, RovingAction,
useContext, RovingTabIndexProvider as SharedRovingTabIndexProvider,
useMemo, type RovingTabIndexProviderProps,
useRef, } from "@element-hq/web-shared-components";
useReducer,
type Reducer,
type Dispatch,
type RefObject,
type ReactNode,
type RefCallback,
} from "react";
import { getKeyBindingsManager } from "../KeyBindingsManager"; import { getKeyBindingsManager } from "../KeyBindingsManager";
import { KeyBindingAction } from "./KeyboardShortcuts"; import { KeyBindingAction } from "./KeyboardShortcuts";
import { type FocusHandler } from "./roving/types";
export { findNextSiblingElement, RovingTabIndexContext } from "@element-hq/web-shared-components";
export { checkInputableElement } from "@element-hq/web-shared-components";
export { RovingStateActionType } from "@element-hq/web-shared-components";
export { useRovingTabIndex } from "@element-hq/web-shared-components";
export type { IAction, IState } from "@element-hq/web-shared-components";
/** /**
* Module to simplify implementing the Roving TabIndex accessibility technique * Module to simplify implementing the Roving TabIndex accessibility technique
@@ -37,370 +35,31 @@ import { type FocusHandler } from "./roving/types";
* https://developer.mozilla.org/en-US/docs/Web/Accessibility/Keyboard-navigable_JavaScript_widgets#Technique_1_Roving_tabindex * https://developer.mozilla.org/en-US/docs/Web/Accessibility/Keyboard-navigable_JavaScript_widgets#Technique_1_Roving_tabindex
*/ */
// Check for form elements which utilize the arrow keys for native functions const getWebRovingAction = (ev: React.KeyboardEvent): RovingAction | undefined => {
// like many of the text input varieties. switch (getKeyBindingsManager().getAccessibilityAction(ev)) {
// case KeyBindingAction.Home:
// i.e. it's ok to press the down arrow on a radio button to move to the next return RovingAction.Home;
// radio. But it's not ok to press the down arrow on a <input type="text"> to case KeyBindingAction.End:
// move away because the down arrow should move the cursor to the end of the return RovingAction.End;
// input. case KeyBindingAction.ArrowLeft:
export function checkInputableElement(el: HTMLElement): boolean { return RovingAction.ArrowLeft;
return el.matches('input:not([type="radio"]):not([type="checkbox"]), textarea, select, [contenteditable=true]'); case KeyBindingAction.ArrowUp:
} return RovingAction.ArrowUp;
case KeyBindingAction.ArrowRight:
export interface IState { return RovingAction.ArrowRight;
activeNode?: HTMLElement; case KeyBindingAction.ArrowDown:
nodes: HTMLElement[]; return RovingAction.ArrowDown;
} case KeyBindingAction.Tab:
return RovingAction.Tab;
export interface IContext {
state: IState;
dispatch: Dispatch<IAction>;
}
export const RovingTabIndexContext = createContext<IContext>({
state: {
nodes: [], // list of nodes in DOM order
},
dispatch: () => {},
});
RovingTabIndexContext.displayName = "RovingTabIndexContext";
export enum Type {
Register = "REGISTER",
Unregister = "UNREGISTER",
SetFocus = "SET_FOCUS",
Update = "UPDATE",
}
export interface IAction {
type: Exclude<Type, Type.Update>;
payload: {
node: HTMLElement;
};
}
interface UpdateAction {
type: Type.Update;
payload?: undefined;
}
type Action = IAction | UpdateAction;
const nodeSorter = (a: HTMLElement, b: HTMLElement): number => {
if (a === b) {
return 0;
}
const position = a.compareDocumentPosition(b);
if (position & Node.DOCUMENT_POSITION_FOLLOWING || position & Node.DOCUMENT_POSITION_CONTAINED_BY) {
return -1;
} else if (position & Node.DOCUMENT_POSITION_PRECEDING || position & Node.DOCUMENT_POSITION_CONTAINS) {
return 1;
} else {
return 0;
}
};
export const reducer: Reducer<IState, Action> = (state: IState, action: Action) => {
switch (action.type) {
case Type.Register: {
if (!state.activeNode) {
// Our list of nodes was empty, set activeNode to this first item
state.activeNode = action.payload.node;
}
if (state.nodes.includes(action.payload.node)) return state;
// Sadly due to the potential of DOM elements swapping order we can't do anything fancy like a binary insert
state.nodes.push(action.payload.node);
state.nodes.sort(nodeSorter);
return { ...state };
}
case Type.Unregister: {
const oldIndex = state.nodes.findIndex((r) => r === action.payload.node);
if (oldIndex === -1) {
return state; // already removed, this should not happen
}
if (state.nodes.splice(oldIndex, 1)[0] === state.activeNode) {
// we just removed the active node, need to replace it
// pick the node closest to the index the old node was in
if (oldIndex >= state.nodes.length) {
state.activeNode = findSiblingElement(state.nodes, state.nodes.length - 1, true);
} else {
state.activeNode =
findSiblingElement(state.nodes, oldIndex) || findSiblingElement(state.nodes, oldIndex, true);
}
if (document.activeElement === document.body) {
// if the focus got reverted to the body then the user was likely focused on the unmounted element
setTimeout(() => state.activeNode?.focus(), 0);
}
}
// update the nodes list
return { ...state };
}
case Type.SetFocus: {
// if the node doesn't change just return the same object reference to skip a re-render
if (state.activeNode === action.payload.node) return state;
// update active node
state.activeNode = action.payload.node;
return { ...state };
}
case Type.Update: {
state.nodes.sort(nodeSorter);
return { ...state };
}
default: default:
return state; return undefined;
} }
}; };
interface IProps { type IProps = Omit<RovingTabIndexProviderProps, "getAction">;
handleLoop?: boolean;
handleHomeEnd?: boolean;
handleUpDown?: boolean;
handleLeftRight?: boolean;
handleInputFields?: boolean;
scrollIntoView?: boolean | ScrollIntoViewOptions;
children(
this: void,
renderProps: {
onKeyDownHandler(this: void, ev: React.KeyboardEvent): void;
onDragEndHandler(this: void): void;
},
): ReactNode;
onKeyDown?(this: void, ev: React.KeyboardEvent, state: IState, dispatch: Dispatch<IAction>): void;
}
export const findSiblingElement = ( export const RovingTabIndexProvider: React.FC<IProps> = (props) => {
nodes: HTMLElement[], return <SharedRovingTabIndexProvider {...props} getAction={getWebRovingAction} />;
startIndex: number,
backwards = false,
loop = false,
): HTMLElement | undefined => {
if (backwards) {
for (let i = startIndex; i < nodes.length && i >= 0; i--) {
if (nodes[i]?.offsetParent !== null) {
return nodes[i];
}
}
if (loop) {
return findSiblingElement(nodes.slice(startIndex + 1), nodes.length - 1, true, false);
}
} else {
for (let i = startIndex; i < nodes.length && i >= 0; i++) {
if (nodes[i]?.offsetParent !== null) {
return nodes[i];
}
}
if (loop) {
return findSiblingElement(nodes.slice(0, startIndex), 0, false, false);
}
}
};
export const RovingTabIndexProvider: React.FC<IProps> = ({
children,
handleHomeEnd,
handleUpDown,
handleLeftRight,
handleLoop,
handleInputFields,
scrollIntoView,
onKeyDown,
}) => {
const [state, dispatch] = useReducer<IState, [Action]>(reducer, {
nodes: [],
});
const context = useMemo<IContext>(() => ({ state, dispatch }), [state]);
const onKeyDownHandler = useCallback(
(ev: React.KeyboardEvent) => {
if (onKeyDown) {
onKeyDown(ev, context.state, context.dispatch);
if (ev.defaultPrevented) {
return;
}
}
let handled = false;
const action = getKeyBindingsManager().getAccessibilityAction(ev);
let focusNode: HTMLElement | undefined;
// Don't interfere with input default keydown behaviour
// but allow people to move focus from it with Tab.
if (!handleInputFields && checkInputableElement(ev.target as HTMLElement)) {
switch (action) {
case KeyBindingAction.Tab:
handled = true;
if (context.state.nodes.length > 0) {
const idx = context.state.nodes.indexOf(context.state.activeNode!);
focusNode = findSiblingElement(
context.state.nodes,
idx + (ev.shiftKey ? -1 : 1),
ev.shiftKey,
);
}
break;
}
} else {
// check if we actually have any items
switch (action) {
case KeyBindingAction.Home:
if (handleHomeEnd) {
handled = true;
// move focus to first (visible) item
focusNode = findSiblingElement(context.state.nodes, 0);
}
break;
case KeyBindingAction.End:
if (handleHomeEnd) {
handled = true;
// move focus to last (visible) item
focusNode = findSiblingElement(context.state.nodes, context.state.nodes.length - 1, true);
}
break;
case KeyBindingAction.ArrowDown:
case KeyBindingAction.ArrowRight:
if (
(action === KeyBindingAction.ArrowDown && handleUpDown) ||
(action === KeyBindingAction.ArrowRight && handleLeftRight)
) {
handled = true;
if (context.state.nodes.length > 0) {
const idx = context.state.nodes.indexOf(context.state.activeNode!);
focusNode = findSiblingElement(context.state.nodes, idx + 1, false, handleLoop);
}
}
break;
case KeyBindingAction.ArrowUp:
case KeyBindingAction.ArrowLeft:
if (
(action === KeyBindingAction.ArrowUp && handleUpDown) ||
(action === KeyBindingAction.ArrowLeft && handleLeftRight)
) {
handled = true;
if (context.state.nodes.length > 0) {
const idx = context.state.nodes.indexOf(context.state.activeNode!);
focusNode = findSiblingElement(context.state.nodes, idx - 1, true, handleLoop);
}
}
break;
}
}
if (handled) {
ev.preventDefault();
ev.stopPropagation();
}
if (focusNode) {
focusNode?.focus();
// programmatic focus doesn't fire the onFocus handler, so we must do the do ourselves
dispatch({
type: Type.SetFocus,
payload: {
node: focusNode,
},
});
if (scrollIntoView) {
focusNode?.scrollIntoView(scrollIntoView);
}
}
},
[
context,
onKeyDown,
handleHomeEnd,
handleUpDown,
handleLeftRight,
handleLoop,
handleInputFields,
scrollIntoView,
],
);
const onDragEndHandler = useCallback(() => {
dispatch({
type: Type.Update,
});
}, []);
return (
<RovingTabIndexContext.Provider value={context}>
{children({ onKeyDownHandler, onDragEndHandler })}
</RovingTabIndexContext.Provider>
);
};
/**
* Hook to register a roving tab index.
*
* inputRef is an optional argument; when passed this ref points to the DOM element
* to which the callback ref is attached.
*
* Returns:
* onFocus should be called when the index gained focus in any manner.
* isActive should be used to set tabIndex in a manner such as `tabIndex={isActive ? 0 : -1}`.
* ref is a callback ref that should be passed to a DOM node which will be used for DOM compareDocumentPosition.
* nodeRef is a ref that points to the DOM element to which the ref mentioned above is attached.
*
* nodeRef = inputRef when inputRef argument is provided.
*/
export const useRovingTabIndex = <T extends HTMLElement>(
inputRef?: RefObject<T | null>,
): [FocusHandler, boolean, RefCallback<T>, RefObject<T | null>] => {
const context = useContext(RovingTabIndexContext);
let nodeRef = useRef<T | null>(null);
if (inputRef) {
// if we are given a ref, use it instead of ours
nodeRef = inputRef;
}
const ref = useCallback((node: T | null) => {
if (node) {
nodeRef.current = node;
context.dispatch({
type: Type.Register,
payload: { node },
});
} else {
context.dispatch({
type: Type.Unregister,
payload: { node: nodeRef.current! },
});
nodeRef.current = null;
}
}, []); // eslint-disable-line react-hooks/exhaustive-deps
const onFocus = useCallback(() => {
if (!nodeRef.current) {
console.warn("useRovingTabIndex.onFocus called but the react ref does not point to any DOM element!");
return;
}
context.dispatch({
type: Type.SetFocus,
payload: { node: nodeRef.current },
});
}, []); // eslint-disable-line react-hooks/exhaustive-deps
// eslint-disable-next-line react-compiler/react-compiler
const isActive = context.state.activeNode === nodeRef.current;
return [onFocus, isActive, ref, nodeRef];
}; };
// re-export the semantic helper components for simplicity // re-export the semantic helper components for simplicity
@@ -6,26 +6,4 @@ SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Com
Please see LICENSE files in the repository root for full details. Please see LICENSE files in the repository root for full details.
*/ */
import { type ReactElement, type RefCallback, type RefObject } from "react"; export { RovingTabIndexWrapper } from "@element-hq/web-shared-components";
import type React from "react";
import { useRovingTabIndex } from "../RovingTabIndex";
import { type FocusHandler } from "./types";
interface IProps {
inputRef?: RefObject<HTMLElement | null>;
children(
this: void,
renderProps: {
onFocus: FocusHandler;
isActive: boolean;
ref: RefCallback<HTMLElement>;
},
): ReactElement<any, any>;
}
// Wrapper to allow use of useRovingTabIndex outside of React Functional Components.
export const RovingTabIndexWrapper: React.FC<IProps> = ({ children, inputRef }) => {
const [onFocus, isActive, ref] = useRovingTabIndex(inputRef);
return children({ onFocus, isActive, ref });
};
@@ -1,9 +0,0 @@
/*
Copyright 2024 New Vector Ltd.
Copyright 2020 The Matrix.org Foundation C.I.C.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
Please see LICENSE files in the repository root for full details.
*/
export type FocusHandler = () => void;
@@ -50,9 +50,9 @@ import { RoomContextDetails } from "../rooms/RoomContextDetails";
import { filterBoolean } from "../../../utils/arrays"; import { filterBoolean } from "../../../utils/arrays";
import { import {
type IState, type IState,
RovingStateActionType,
RovingTabIndexContext, RovingTabIndexContext,
RovingTabIndexProvider, RovingTabIndexProvider,
Type,
useRovingTabIndex, useRovingTabIndex,
} from "../../../accessibility/RovingTabIndex"; } from "../../../accessibility/RovingTabIndex";
import { getKeyBindingsManager } from "../../../KeyBindingsManager"; import { getKeyBindingsManager } from "../../../KeyBindingsManager";
@@ -368,7 +368,7 @@ const ForwardDialog: React.FC<IProps> = ({ matrixClient: cli, event, permalinkCr
const node = context.state.nodes[0]; const node = context.state.nodes[0];
if (node) { if (node) {
context.dispatch({ context.dispatch({
type: Type.SetFocus, type: RovingStateActionType.SetFocus,
payload: { node }, payload: { node },
}); });
node?.scrollIntoView?.({ node?.scrollIntoView?.({
@@ -44,10 +44,10 @@ import {
import { KeyBindingAction } from "../../../../accessibility/KeyboardShortcuts"; import { KeyBindingAction } from "../../../../accessibility/KeyboardShortcuts";
import { import {
findSiblingElement, findNextSiblingElement,
RovingStateActionType,
RovingTabIndexContext, RovingTabIndexContext,
RovingTabIndexProvider, RovingTabIndexProvider,
Type,
} from "../../../../accessibility/RovingTabIndex"; } from "../../../../accessibility/RovingTabIndex";
import { mediaFromMxc } from "../../../../customisations/Media"; import { mediaFromMxc } from "../../../../customisations/Media";
import { Action } from "../../../../dispatcher/actions"; import { Action } from "../../../../dispatcher/actions";
@@ -537,7 +537,7 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
const node = rovingContext.state.nodes[0]; const node = rovingContext.state.nodes[0];
if (node) { if (node) {
rovingContext.dispatch({ rovingContext.dispatch({
type: Type.SetFocus, type: RovingStateActionType.SetFocus,
payload: { node }, payload: { node },
}); });
node?.scrollIntoView?.({ node?.scrollIntoView?.({
@@ -1181,7 +1181,10 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
} }
const idx = nodes.indexOf(rovingContext.state.activeNode); const idx = nodes.indexOf(rovingContext.state.activeNode);
node = findSiblingElement(nodes, idx + (accessibilityAction === KeyBindingAction.ArrowUp ? -1 : 1)); node = findNextSiblingElement(
nodes,
idx + (accessibilityAction === KeyBindingAction.ArrowUp ? -1 : 1),
);
} }
break; break;
@@ -1201,7 +1204,7 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
const nodes = rovingContext.state.nodes.filter(nodeIsForRecentlyViewed); const nodes = rovingContext.state.nodes.filter(nodeIsForRecentlyViewed);
const idx = nodes.indexOf(rovingContext.state.activeNode); const idx = nodes.indexOf(rovingContext.state.activeNode);
node = findSiblingElement( node = findNextSiblingElement(
nodes, nodes,
idx + (accessibilityAction === KeyBindingAction.ArrowLeft ? -1 : 1), idx + (accessibilityAction === KeyBindingAction.ArrowLeft ? -1 : 1),
); );
@@ -1211,7 +1214,7 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
if (node) { if (node) {
rovingContext.dispatch({ rovingContext.dispatch({
type: Type.SetFocus, type: RovingStateActionType.SetFocus,
payload: { node }, payload: { node },
}); });
node?.scrollIntoView({ node?.scrollIntoView({
@@ -25,7 +25,7 @@ import {
type IAction as RovingAction, type IAction as RovingAction,
type IState as RovingState, type IState as RovingState,
RovingTabIndexProvider, RovingTabIndexProvider,
Type, RovingStateActionType,
} from "../../../accessibility/RovingTabIndex"; } from "../../../accessibility/RovingTabIndex";
import { Key } from "../../../Keyboard"; import { Key } from "../../../Keyboard";
import { type ButtonEvent } from "../elements/AccessibleButton"; import { type ButtonEvent } from "../elements/AccessibleButton";
@@ -187,7 +187,7 @@ class EmojiPicker extends React.Component<IProps, IState> {
focusNode?.focus(); focusNode?.focus();
} }
dispatch({ dispatch({
type: Type.SetFocus, type: RovingStateActionType.SetFocus,
payload: { node: focusNode }, payload: { node: focusNode },
}); });
@@ -212,7 +212,7 @@ class EmojiPicker extends React.Component<IProps, IState> {
// Reset to first emoji when showing highlight for the first time (or after it was hidden) // Reset to first emoji when showing highlight for the first time (or after it was hidden)
if (state.nodes.length > 0) { if (state.nodes.length > 0) {
dispatch({ dispatch({
type: Type.SetFocus, type: RovingStateActionType.SetFocus,
payload: { node: state.nodes[0] }, payload: { node: state.nodes[0] },
}); });
} }
@@ -0,0 +1,96 @@
/*
Copyright 2026 Element Creations Ltd.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
Please see LICENSE files in the repository root for full details.
*/
import React from "react";
import { render } from "jest-matrix-react";
import { RovingAction, type RovingTabIndexProviderProps } from "@element-hq/web-shared-components";
import * as KeyBindingsManagerModule from "../../../src/KeyBindingsManager";
import { KeyBindingAction } from "../../../src/accessibility/KeyboardShortcuts";
import { RovingTabIndexProvider } from "../../../src/accessibility/RovingTabIndex";
jest.mock("@element-hq/web-shared-components", () => {
const actual = jest.requireActual("@element-hq/web-shared-components");
const mockSharedRovingTabIndexProvider = jest.fn(({ children }: RovingTabIndexProviderProps) => {
return <>{children({ onDragEndHandler: jest.fn(), onKeyDownHandler: jest.fn() })}</>;
});
return {
__mockSharedRovingTabIndexProvider: mockSharedRovingTabIndexProvider,
...actual,
RovingTabIndexProvider: mockSharedRovingTabIndexProvider,
};
});
const getMockSharedRovingTabIndexProvider = (): jest.Mock => {
return jest.requireMock("@element-hq/web-shared-components").__mockSharedRovingTabIndexProvider as jest.Mock;
};
const getInjectedGetAction = (): NonNullable<RovingTabIndexProviderProps["getAction"]> => {
const mockSharedRovingTabIndexProvider = getMockSharedRovingTabIndexProvider();
expect(mockSharedRovingTabIndexProvider).toHaveBeenCalled();
const getAction = (mockSharedRovingTabIndexProvider.mock.calls.at(-1)![0] as RovingTabIndexProviderProps).getAction;
expect(getAction).toBeDefined();
return getAction!;
};
describe("RovingTabIndex adapter", () => {
beforeEach(() => {
const mockSharedRovingTabIndexProvider = getMockSharedRovingTabIndexProvider();
mockSharedRovingTabIndexProvider.mockClear();
jest.restoreAllMocks();
});
it.each([
[KeyBindingAction.ArrowDown, RovingAction.ArrowDown],
[KeyBindingAction.ArrowUp, RovingAction.ArrowUp],
[KeyBindingAction.ArrowRight, RovingAction.ArrowRight],
[KeyBindingAction.ArrowLeft, RovingAction.ArrowLeft],
[KeyBindingAction.Home, RovingAction.Home],
[KeyBindingAction.End, RovingAction.End],
[KeyBindingAction.Tab, RovingAction.Tab],
])("maps %s to %s", (accessibilityAction, expectedRovingAction) => {
const manager = new KeyBindingsManagerModule.KeyBindingsManager();
jest.spyOn(KeyBindingsManagerModule, "getKeyBindingsManager").mockReturnValue(manager);
jest.spyOn(manager, "getAccessibilityAction").mockReturnValue(accessibilityAction);
render(<RovingTabIndexProvider>{() => null}</RovingTabIndexProvider>);
const getAction = getInjectedGetAction();
expect(getAction({ key: "irrelevant" } as React.KeyboardEvent)).toBe(expectedRovingAction);
});
it("returns undefined when there is no matching accessibility action", () => {
const manager = new KeyBindingsManagerModule.KeyBindingsManager();
jest.spyOn(KeyBindingsManagerModule, "getKeyBindingsManager").mockReturnValue(manager);
jest.spyOn(manager, "getAccessibilityAction").mockReturnValue(undefined);
render(<RovingTabIndexProvider>{() => null}</RovingTabIndexProvider>);
const getAction = getInjectedGetAction();
expect(getAction({ key: "x" } as React.KeyboardEvent)).toBeUndefined();
});
it("forwards provider props to shared-components", () => {
const onKeyDown = jest.fn();
render(
<RovingTabIndexProvider handleHomeEnd handleLoop handleUpDown onKeyDown={onKeyDown} scrollIntoView>
{() => null}
</RovingTabIndexProvider>,
);
const mockSharedRovingTabIndexProvider = getMockSharedRovingTabIndexProvider();
const props = mockSharedRovingTabIndexProvider.mock.calls.at(-1)![0] as RovingTabIndexProviderProps;
expect(props.handleHomeEnd).toBe(true);
expect(props.handleLoop).toBe(true);
expect(props.handleUpDown).toBe(true);
expect(props.onKeyDown).toBe(onKeyDown);
expect(props.scrollIntoView).toBe(true);
expect(props.getAction).toEqual(expect.any(Function));
});
});
@@ -1,30 +1,31 @@
/* /*
Copyright 2024 New Vector Ltd. * Copyright 2026 Element Creations Ltd.
Copyright 2020, 2021 The Matrix.org Foundation C.I.C. *
* SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial * Please see LICENSE files in the repository root for full details.
Please see LICENSE files in the repository root for full details. */
*/
import React, { type HTMLAttributes } from "react"; import React, { type HTMLAttributes } from "react";
import { act, render } from "jest-matrix-react";
import userEvent from "@testing-library/user-event"; import userEvent from "@testing-library/user-event";
import { act, fireEvent, render } from "@test-utils";
import { describe, expect, it, vi } from "vitest";
import { import {
type IState, RovingAction,
reducer, RovingStateActionType,
RovingTabIndexProvider, RovingTabIndexProvider,
RovingTabIndexWrapper, RovingTabIndexWrapper,
Type,
useRovingTabIndex, useRovingTabIndex,
} from "../../../src/accessibility/RovingTabIndex"; } from ".";
import type { IState } from ".";
import { reducer } from "./RovingTabIndex";
const Button = (props: HTMLAttributes<HTMLButtonElement>) => { const Button = (props: HTMLAttributes<HTMLButtonElement>): React.JSX.Element => {
const [onFocus, isActive, ref] = useRovingTabIndex<HTMLButtonElement>(); const [onFocus, isActive, ref] = useRovingTabIndex<HTMLButtonElement>();
return <button {...props} onFocus={onFocus} tabIndex={isActive ? 0 : -1} ref={ref} />; return <button {...props} onFocus={onFocus} tabIndex={isActive ? 0 : -1} ref={ref} />;
}; };
const checkTabIndexes = (buttons: NodeListOf<HTMLElement>, expectations: number[]) => { const checkTabIndexes = (buttons: NodeListOf<HTMLElement>, expectations: number[]): void => {
expect([...buttons].map((b) => b.tabIndex)).toStrictEqual(expectations); expect([...buttons].map((b) => b.tabIndex)).toStrictEqual(expectations);
}; };
@@ -34,13 +35,26 @@ const createButtonElement = (text: string): HTMLButtonElement => {
return button; return button;
}; };
// give the buttons keys for the fibre reconciler to not treat them all as the same const renderToolbar = (
ui: React.ReactNode,
props: Partial<React.ComponentProps<typeof RovingTabIndexProvider>> = {},
): ReturnType<typeof render> => {
return render(
<RovingTabIndexProvider {...props}>
{({ onKeyDownHandler }) => (
<div aria-label="Roving test container" onKeyDown={onKeyDownHandler} role="toolbar">
{ui}
</div>
)}
</RovingTabIndexProvider>,
);
};
const button1 = <Button key={1}>a</Button>; const button1 = <Button key={1}>a</Button>;
const button2 = <Button key={2}>b</Button>; const button2 = <Button key={2}>b</Button>;
const button3 = <Button key={3}>c</Button>; const button3 = <Button key={3}>c</Button>;
const button4 = <Button key={4}>d</Button>; const button4 = <Button key={4}>d</Button>;
// mock offsetParent
Object.defineProperty(HTMLElement.prototype, "offsetParent", { Object.defineProperty(HTMLElement.prototype, "offsetParent", {
get() { get() {
return this.parentNode; return this.parentNode;
@@ -48,7 +62,7 @@ Object.defineProperty(HTMLElement.prototype, "offsetParent", {
}); });
describe("RovingTabIndex", () => { describe("RovingTabIndex", () => {
it("RovingTabIndexProvider renders children as expected", () => { it("renders children as expected", () => {
const { container } = render( const { container } = render(
<RovingTabIndexProvider> <RovingTabIndexProvider>
{() => ( {() => (
@@ -62,88 +76,81 @@ describe("RovingTabIndex", () => {
expect(container.innerHTML).toBe("<div><span>Test</span></div>"); expect(container.innerHTML).toBe("<div><span>Test</span></div>");
}); });
it("RovingTabIndexProvider works as expected with useRovingTabIndex", () => { it("works as expected with useRovingTabIndex", () => {
const { container, rerender } = render( const { container, rerender } = render(
<RovingTabIndexProvider> <RovingTabIndexProvider>
{() => ( {() => (
<React.Fragment> <>
{button1} {button1}
{button2} {button2}
{button3} {button3}
</React.Fragment> </>
)} )}
</RovingTabIndexProvider>, </RovingTabIndexProvider>,
); );
// should begin with 0th being active
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]); checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
// focus on 2nd button and test it is the only active one
act(() => container.querySelectorAll("button")[2].focus()); act(() => container.querySelectorAll("button")[2].focus());
checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]); checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]);
// focus on 1st button and test it is the only active one
act(() => container.querySelectorAll("button")[1].focus()); act(() => container.querySelectorAll("button")[1].focus());
checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]); checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]);
// check that the active button does not change even on an explicit blur event
act(() => container.querySelectorAll("button")[1].blur()); act(() => container.querySelectorAll("button")[1].blur());
checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]); checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]);
// update the children, it should remain on the same button
rerender( rerender(
<RovingTabIndexProvider> <RovingTabIndexProvider>
{() => ( {() => (
<React.Fragment> <>
{button1} {button1}
{button4} {button4}
{button2} {button2}
{button3} {button3}
</React.Fragment> </>
)} )}
</RovingTabIndexProvider>, </RovingTabIndexProvider>,
); );
checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0, -1]); checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0, -1]);
// update the children, remove the active button, it should move to the next one
rerender( rerender(
<RovingTabIndexProvider> <RovingTabIndexProvider>
{() => ( {() => (
<React.Fragment> <>
{button1} {button1}
{button4} {button4}
{button3} {button3}
</React.Fragment> </>
)} )}
</RovingTabIndexProvider>, </RovingTabIndexProvider>,
); );
checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]); checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]);
}); });
it("RovingTabIndexProvider provides a ref to the dom element", () => { it("provides a ref to the dom element", () => {
const nodeRef = React.createRef<HTMLButtonElement>(); const nodeRef = React.createRef<HTMLButtonElement>();
const MyButton = (props: HTMLAttributes<HTMLButtonElement>) => { const MyButton = (props: HTMLAttributes<HTMLButtonElement>): React.JSX.Element => {
const [onFocus, isActive, ref] = useRovingTabIndex<HTMLButtonElement>(nodeRef); const [onFocus, isActive, ref] = useRovingTabIndex<HTMLButtonElement>(nodeRef);
return <button {...props} onFocus={onFocus} tabIndex={isActive ? 0 : -1} ref={ref} />; return <button {...props} onFocus={onFocus} tabIndex={isActive ? 0 : -1} ref={ref} />;
}; };
const { container } = render( const { container } = render(
<RovingTabIndexProvider> <RovingTabIndexProvider>
{() => ( {() => (
<React.Fragment> <>
<MyButton /> <MyButton />
</React.Fragment> </>
)} )}
</RovingTabIndexProvider>, </RovingTabIndexProvider>,
); );
// nodeRef should point to button
expect(nodeRef.current).toBe(container.querySelector("button")); expect(nodeRef.current).toBe(container.querySelector("button"));
}); });
it("RovingTabIndexProvider works as expected with RovingTabIndexWrapper", () => { it("works as expected with RovingTabIndexWrapper", () => {
const { container } = render( const { container } = render(
<RovingTabIndexProvider> <RovingTabIndexProvider>
{() => ( {() => (
<React.Fragment> <>
{button1} {button1}
{button2} {button2}
<RovingTabIndexWrapper> <RovingTabIndexWrapper>
@@ -153,15 +160,13 @@ describe("RovingTabIndex", () => {
</button> </button>
)} )}
</RovingTabIndexWrapper> </RovingTabIndexWrapper>
</React.Fragment> </>
)} )}
</RovingTabIndexProvider>, </RovingTabIndexProvider>,
); );
// should begin with 0th being active
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]); checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
// focus on 2nd button and test it is the only active one
act(() => container.querySelectorAll("button")[2].focus()); act(() => container.querySelectorAll("button")[2].focus());
checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]); checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]);
}); });
@@ -177,7 +182,7 @@ describe("RovingTabIndex", () => {
nodes: [node1, node2], nodes: [node1, node2],
}, },
{ {
type: Type.SetFocus, type: RovingStateActionType.SetFocus,
payload: { payload: {
node: node2, node: node2,
}, },
@@ -190,49 +195,49 @@ describe("RovingTabIndex", () => {
}); });
it("Unregister works as expected", () => { it("Unregister works as expected", () => {
const button1 = createButtonElement("Button 1"); const unregisterButton1 = createButtonElement("Button 1");
const button2 = createButtonElement("Button 2"); const unregisterButton2 = createButtonElement("Button 2");
const button3 = createButtonElement("Button 3"); const unregisterButton3 = createButtonElement("Button 3");
const button4 = createButtonElement("Button 4"); const unregisterButton4 = createButtonElement("Button 4");
let state: IState = { let state: IState = {
nodes: [button1, button2, button3, button4], nodes: [unregisterButton1, unregisterButton2, unregisterButton3, unregisterButton4],
}; };
state = reducer(state, { state = reducer(state, {
type: Type.Unregister, type: RovingStateActionType.Unregister,
payload: { payload: {
node: button2, node: unregisterButton2,
}, },
}); });
expect(state).toStrictEqual({ expect(state).toStrictEqual({
nodes: [button1, button3, button4], nodes: [unregisterButton1, unregisterButton3, unregisterButton4],
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Unregister, type: RovingStateActionType.Unregister,
payload: { payload: {
node: button3, node: unregisterButton3,
}, },
}); });
expect(state).toStrictEqual({ expect(state).toStrictEqual({
nodes: [button1, button4], nodes: [unregisterButton1, unregisterButton4],
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Unregister, type: RovingStateActionType.Unregister,
payload: { payload: {
node: button4, node: unregisterButton4,
}, },
}); });
expect(state).toStrictEqual({ expect(state).toStrictEqual({
nodes: [button1], nodes: [unregisterButton1],
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Unregister, type: RovingStateActionType.Unregister,
payload: { payload: {
node: button1, node: unregisterButton1,
}, },
}); });
expect(state).toStrictEqual({ expect(state).toStrictEqual({
@@ -247,12 +252,12 @@ describe("RovingTabIndex", () => {
const ref4 = React.createRef<HTMLElement>(); const ref4 = React.createRef<HTMLElement>();
render( render(
<React.Fragment> <>
<span ref={ref1} /> <span ref={ref1} />
<span ref={ref2} /> <span ref={ref2} />
<span ref={ref3} /> <span ref={ref3} />
<span ref={ref4} /> <span ref={ref4} />
</React.Fragment>, </>,
); );
let state: IState = { let state: IState = {
@@ -260,7 +265,7 @@ describe("RovingTabIndex", () => {
}; };
state = reducer(state, { state = reducer(state, {
type: Type.Register, type: RovingStateActionType.Register,
payload: { payload: {
node: ref1.current!, node: ref1.current!,
}, },
@@ -271,7 +276,7 @@ describe("RovingTabIndex", () => {
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Register, type: RovingStateActionType.Register,
payload: { payload: {
node: ref2.current!, node: ref2.current!,
}, },
@@ -282,7 +287,7 @@ describe("RovingTabIndex", () => {
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Register, type: RovingStateActionType.Register,
payload: { payload: {
node: ref3.current!, node: ref3.current!,
}, },
@@ -293,7 +298,7 @@ describe("RovingTabIndex", () => {
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Register, type: RovingStateActionType.Register,
payload: { payload: {
node: ref4.current!, node: ref4.current!,
}, },
@@ -303,9 +308,8 @@ describe("RovingTabIndex", () => {
nodes: [ref1.current, ref2.current, ref3.current, ref4.current], nodes: [ref1.current, ref2.current, ref3.current, ref4.current],
}); });
// test that the automatic focus switch works for unmounting
state = reducer(state, { state = reducer(state, {
type: Type.SetFocus, type: RovingStateActionType.SetFocus,
payload: { payload: {
node: ref2.current!, node: ref2.current!,
}, },
@@ -316,7 +320,7 @@ describe("RovingTabIndex", () => {
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Unregister, type: RovingStateActionType.Unregister,
payload: { payload: {
node: ref2.current!, node: ref2.current!,
}, },
@@ -326,9 +330,8 @@ describe("RovingTabIndex", () => {
nodes: [ref1.current, ref3.current, ref4.current], nodes: [ref1.current, ref3.current, ref4.current],
}); });
// test that the insert into the middle works as expected
state = reducer(state, { state = reducer(state, {
type: Type.Register, type: RovingStateActionType.Register,
payload: { payload: {
node: ref2.current!, node: ref2.current!,
}, },
@@ -338,15 +341,14 @@ describe("RovingTabIndex", () => {
nodes: [ref1.current, ref2.current, ref3.current, ref4.current], nodes: [ref1.current, ref2.current, ref3.current, ref4.current],
}); });
// test that insertion at the edges works
state = reducer(state, { state = reducer(state, {
type: Type.Unregister, type: RovingStateActionType.Unregister,
payload: { payload: {
node: ref1.current!, node: ref1.current!,
}, },
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Unregister, type: RovingStateActionType.Unregister,
payload: { payload: {
node: ref4.current!, node: ref4.current!,
}, },
@@ -357,14 +359,14 @@ describe("RovingTabIndex", () => {
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Register, type: RovingStateActionType.Register,
payload: { payload: {
node: ref1.current!, node: ref1.current!,
}, },
}); });
state = reducer(state, { state = reducer(state, {
type: Type.Register, type: RovingStateActionType.Register,
payload: { payload: {
node: ref4.current!, node: ref4.current!,
}, },
@@ -376,18 +378,15 @@ describe("RovingTabIndex", () => {
}); });
}); });
describe("handles arrow keys", () => { describe("handles keyboard navigation", () => {
it("should handle up/down arrow keys work when handleUpDown=true", async () => { it("handles up/down arrow keys when handleUpDown=true", async () => {
const { container } = render( const { container } = renderToolbar(
<RovingTabIndexProvider handleUpDown> <>
{({ onKeyDownHandler }) => ( {button1}
<div onKeyDown={onKeyDownHandler}> {button2}
{button1} {button3}
{button2} </>,
{button3} { handleUpDown: true },
</div>
)}
</RovingTabIndexProvider>,
); );
act(() => container.querySelectorAll("button")[0].focus()); act(() => container.querySelectorAll("button")[0].focus());
@@ -405,29 +404,160 @@ describe("RovingTabIndex", () => {
await userEvent.keyboard("[ArrowUp]"); await userEvent.keyboard("[ArrowUp]");
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]); checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
// Does not loop without
await userEvent.keyboard("[ArrowUp]"); await userEvent.keyboard("[ArrowUp]");
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]); checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
}); });
it("should call scrollIntoView if specified", async () => { it("handles left/right arrow keys when handleLeftRight=true", async () => {
const { container } = render( const { container } = renderToolbar(
<RovingTabIndexProvider handleUpDown scrollIntoView> <>
{({ onKeyDownHandler }) => ( {button1}
<div onKeyDown={onKeyDownHandler}> {button2}
{button1} {button3}
{button2} </>,
{button3} { handleLeftRight: true },
</div> );
)}
</RovingTabIndexProvider>, act(() => container.querySelectorAll("button")[0].focus());
await userEvent.keyboard("[ArrowRight]");
checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]);
await userEvent.keyboard("[ArrowLeft]");
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
});
it("handles Home and End when handleHomeEnd=true", async () => {
const { container } = renderToolbar(
<>
{button1}
{button2}
{button3}
</>,
{ handleHomeEnd: true },
);
act(() => container.querySelectorAll("button")[1].focus());
checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]);
await userEvent.keyboard("[End]");
checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]);
await userEvent.keyboard("[Home]");
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
});
it("loops when handleLoop=true", async () => {
const { container } = renderToolbar(
<>
{button1}
{button2}
{button3}
</>,
{ handleUpDown: true, handleLoop: true },
);
act(() => container.querySelectorAll("button")[2].focus());
await userEvent.keyboard("[ArrowDown]");
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
await userEvent.keyboard("[ArrowUp]");
checkTabIndexes(container.querySelectorAll("button"), [-1, -1, 0]);
});
it("uses a custom getAction mapper", async () => {
const getAction = vi.fn((ev: React.KeyboardEvent): RovingAction | undefined => {
if (ev.key === "j") {
return RovingAction.ArrowDown;
}
return undefined;
});
const { container } = renderToolbar(
<>
{button1}
{button2}
{button3}
</>,
{ handleUpDown: true, getAction },
);
act(() => container.querySelectorAll("button")[0].focus());
await userEvent.keyboard("j");
expect(getAction).toHaveBeenCalled();
checkTabIndexes(container.querySelectorAll("button"), [-1, 0, -1]);
});
it("handles input fields when handleInputFields=true", () => {
const { container, getByRole } = renderToolbar(
<>
{button1}
<input aria-label="Search input" />
{button2}
</>,
{ handleUpDown: true, handleInputFields: true },
);
act(() => container.querySelectorAll("button")[0].focus());
const input = getByRole("textbox", { name: "Search input" });
fireEvent.keyDown(input, { key: "ArrowDown" });
checkTabIndexes(container.querySelectorAll("button"), [-1, 0]);
});
it("moves from an input field with Tab when handleInputFields=false", () => {
const { container, getByRole } = renderToolbar(
<>
{button1}
<input aria-label="Search input" />
{button2}
</>,
);
act(() => container.querySelectorAll("button")[0].focus());
const input = getByRole("textbox", { name: "Search input" });
act(() => (input as HTMLElement).focus());
fireEvent.keyDown(input, { key: "Tab" });
checkTabIndexes(container.querySelectorAll("button"), [-1, 0]);
});
it("stops provider processing when onKeyDown prevents default", () => {
const onKeyDown = vi.fn((event: React.KeyboardEvent): void => {
event.preventDefault();
});
const { container } = renderToolbar(
<>
{button1}
{button2}
{button3}
</>,
{ handleUpDown: true, onKeyDown },
);
act(() => container.querySelectorAll("button")[0].focus());
fireEvent.keyDown(container.querySelector('[role="toolbar"]')!, { key: "ArrowDown" });
expect(onKeyDown).toHaveBeenCalled();
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
});
it("calls scrollIntoView if specified", async () => {
const { container } = renderToolbar(
<>
{button1}
{button2}
{button3}
</>,
{ handleUpDown: true, scrollIntoView: true },
); );
act(() => container.querySelectorAll("button")[0].focus()); act(() => container.querySelectorAll("button")[0].focus());
checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]); checkTabIndexes(container.querySelectorAll("button"), [0, -1, -1]);
const button = container.querySelectorAll("button")[1]; const button = container.querySelectorAll("button")[1];
const mock = jest.spyOn(button, "scrollIntoView"); const mock = vi.spyOn(button, "scrollIntoView");
await userEvent.keyboard("[ArrowDown]"); await userEvent.keyboard("[ArrowDown]");
expect(mock).toHaveBeenCalled(); expect(mock).toHaveBeenCalled();
}); });
@@ -0,0 +1,611 @@
/*
* Copyright 2026 Element Creations Ltd.
*
* SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
* Please see LICENSE files in the repository root for full details.
*/
import React, {
createContext,
useCallback,
useContext,
useMemo,
useRef,
useReducer,
type Dispatch,
type KeyboardEvent,
type ReactNode,
type Reducer,
type RefCallback,
type RefObject,
} from "react";
/**
* Returns whether an element should keep native arrow-key behaviour instead of
* being intercepted by roving focus navigation.
*
* This excludes radio buttons and checkboxes, which commonly participate in
* directional navigation patterns.
*
* @param el - The element being evaluated for native input behaviour.
* @returns `true` when the element should keep its own arrow-key handling.
*/
export function checkInputableElement(el: HTMLElement): boolean {
return el.matches('input:not([type="radio"]):not([type="checkbox"]), textarea, select, [contenteditable=true]');
}
/**
* The current state of a roving tabindex group.
*/
export interface IState {
/**
* The element that currently owns the active tab stop.
*/
activeNode?: HTMLElement;
/**
* Registered elements in DOM order.
*/
nodes: HTMLElement[];
}
/**
* The value exposed by {@link RovingTabIndexContext}.
*/
export interface IContext {
state: IState;
dispatch: Dispatch<IAction>;
}
/**
* React context used by roving tabindex participants to register themselves and
* update the active item.
*/
export const RovingTabIndexContext = createContext<IContext>({
state: {
nodes: [], // list of nodes in DOM order
},
dispatch: () => {},
});
RovingTabIndexContext.displayName = "RovingTabIndexContext";
/**
* Internal reducer action kinds used by the roving tabindex state machine.
*/
export enum RovingStateActionType {
Register = "REGISTER",
Unregister = "UNREGISTER",
SetFocus = "SET_FOCUS",
Update = "UPDATE",
}
/**
* An action dispatched to the roving tabindex reducer for node registration and
* focus updates.
*/
export interface IAction {
/**
* The reducer action kind.
*/
type: Exclude<RovingStateActionType, RovingStateActionType.Update>;
/**
* Action payload carrying the target node.
*/
payload: {
/**
* The DOM node affected by the action.
*/
node: HTMLElement;
};
}
interface UpdateAction {
type: RovingStateActionType.Update;
payload?: never;
}
type Action = IAction | UpdateAction;
/**
* Normalized navigation intents understood by the shared roving provider.
*/
export enum RovingAction {
Home = "HOME",
End = "END",
ArrowLeft = "ARROW_LEFT",
ArrowUp = "ARROW_UP",
ArrowRight = "ARROW_RIGHT",
ArrowDown = "ARROW_DOWN",
Tab = "TAB",
}
/**
* Props for {@link RovingTabIndexProvider}.
*/
export interface RovingTabIndexProviderProps {
/**
* Whether directional navigation should wrap from the last item to the first
* and vice versa.
*/
handleLoop?: boolean;
/**
* Whether `Home` and `End` should move focus to the first and last item.
*/
handleHomeEnd?: boolean;
/**
* Whether vertical arrow keys should move focus within the group.
*/
handleUpDown?: boolean;
/**
* Whether horizontal arrow keys should move focus within the group.
*/
handleLeftRight?: boolean;
/**
* Whether text inputs and similar controls should participate in roving
* keyboard handling instead of keeping their native arrow-key behaviour.
*/
handleInputFields?: boolean;
/**
* Whether newly focused items should be scrolled into view.
*
* Pass `true` to use the browser default, or a scroll options object to
* control alignment and behaviour.
*/
scrollIntoView?: boolean | ScrollIntoViewOptions;
/**
* Render prop receiving keyboard and drag-end handlers for the roving
* container.
*/
children(
this: void,
renderProps: {
/**
* Handles keyboard navigation for the roving container.
*/
onKeyDownHandler(this: void, ev: KeyboardEvent): void;
/**
* Re-sorts registered elements after DOM reordering, such as drag and
* drop.
*/
onDragEndHandler(this: void): void;
},
): ReactNode;
/**
* Optional callback invoked before the provider performs its own keyboard
* handling.
*
* Call `preventDefault()` on the event to suppress the built-in behaviour.
*/
onKeyDown?(this: void, ev: KeyboardEvent, state: IState, dispatch: Dispatch<IAction>): void;
/**
* Optional action resolver used to map keyboard events to
* {@link RovingAction} values.
*
* When omitted, a default mapping based on `KeyboardEvent.key` is used.
*/
getAction?(this: void, ev: KeyboardEvent): RovingAction | undefined;
}
const nodeSorter = (a: HTMLElement, b: HTMLElement): number => {
if (a === b) {
return 0;
}
const position = a.compareDocumentPosition(b);
if (position & Node.DOCUMENT_POSITION_FOLLOWING || position & Node.DOCUMENT_POSITION_CONTAINED_BY) {
return -1;
} else if (position & Node.DOCUMENT_POSITION_PRECEDING || position & Node.DOCUMENT_POSITION_CONTAINS) {
return 1;
} else {
return 0;
}
};
const getReplacementActiveNode = (nodes: HTMLElement[], removedIndex: number): HTMLElement | undefined => {
if (removedIndex >= nodes.length) {
return findPreviousSiblingElement(nodes, nodes.length - 1);
}
return findNextSiblingElement(nodes, removedIndex) || findPreviousSiblingElement(nodes, removedIndex);
};
const handleRemovedActiveNode = (state: IState, removedIndex: number): void => {
state.activeNode = getReplacementActiveNode(state.nodes, removedIndex);
if (document.activeElement === document.body) {
// if the focus got reverted to the body then the user was likely focused on the unmounted element
setTimeout(() => state.activeNode?.focus(), 0);
}
};
/**
* Reducer that tracks registered nodes and the currently active roving tab
* stop.
*/
export const reducer: Reducer<IState, Action> = (state: IState, action: Action) => {
switch (action.type) {
case RovingStateActionType.Register: {
// Our list of nodes was empty, set activeNode to this first item
state.activeNode ??= action.payload.node;
if (state.nodes.includes(action.payload.node)) return state;
// Sadly due to the potential of DOM elements swapping order we can't do anything fancy like a binary insert
state.nodes.push(action.payload.node);
state.nodes.sort(nodeSorter);
return { ...state };
}
case RovingStateActionType.Unregister: {
const oldIndex = state.nodes.indexOf(action.payload.node);
if (oldIndex === -1) {
return state; // already removed, this should not happen
}
if (state.nodes.splice(oldIndex, 1)[0] === state.activeNode) {
handleRemovedActiveNode(state, oldIndex);
}
return { ...state };
}
case RovingStateActionType.SetFocus: {
if (state.activeNode === action.payload.node) return state;
state.activeNode = action.payload.node;
return { ...state };
}
case RovingStateActionType.Update: {
state.nodes.sort(nodeSorter);
return { ...state };
}
default:
return state;
}
};
const findSiblingElementInRange = (
nodes: HTMLElement[],
startIndex: number,
endIndex: number,
step: 1 | -1,
): HTMLElement | undefined => {
if (step === 1) {
for (let i = startIndex; i < endIndex; i += step) {
if (nodes[i]?.offsetParent !== null) {
return nodes[i];
}
}
} else {
for (let i = startIndex; i > endIndex; i += step) {
if (nodes[i]?.offsetParent !== null) {
return nodes[i];
}
}
}
};
/**
* Finds the next visible sibling element starting from a given index.
*
* @param nodes - Registered roving nodes in DOM order.
* @param startIndex - The index to begin searching from.
* @param loop - Whether to wrap around when no visible sibling is found.
* @returns The next visible sibling element, if one exists.
*/
export const findNextSiblingElement = (
nodes: HTMLElement[],
startIndex: number,
loop = false,
): HTMLElement | undefined => {
const sibling = findSiblingElementInRange(nodes, startIndex, nodes.length, 1);
if (sibling || !loop) {
return sibling;
}
return findSiblingElementInRange(nodes.slice(0, startIndex), 0, startIndex, 1);
};
/**
* Finds the previous visible sibling element starting from a given index.
*
* @param nodes - Registered roving nodes in DOM order.
* @param startIndex - The index to begin searching from.
* @param loop - Whether to wrap around when no visible sibling is found.
* @returns The previous visible sibling element, if one exists.
*/
export const findPreviousSiblingElement = (
nodes: HTMLElement[],
startIndex: number,
loop = false,
): HTMLElement | undefined => {
const sibling = findSiblingElementInRange(nodes, startIndex, -1, -1);
if (sibling || !loop) {
return sibling;
}
const loopNodes = nodes.slice(startIndex + 1);
return findSiblingElementInRange(loopNodes, loopNodes.length - 1, -1, -1);
};
const getDefaultAction = (ev: KeyboardEvent): RovingAction | undefined => {
switch (ev.key) {
case "Home":
return RovingAction.Home;
case "End":
return RovingAction.End;
case "ArrowLeft":
return RovingAction.ArrowLeft;
case "ArrowUp":
return RovingAction.ArrowUp;
case "ArrowRight":
return RovingAction.ArrowRight;
case "ArrowDown":
return RovingAction.ArrowDown;
case "Tab":
return RovingAction.Tab;
default:
return undefined;
}
};
interface NavigationResult {
handled: boolean;
focusNode?: HTMLElement;
}
interface StandardNavigationConfig {
enabled: boolean;
getFocusNode(state: IState): HTMLElement | undefined;
}
const getAdjacentFocusNode = (
nodes: HTMLElement[],
activeNode: HTMLElement | undefined,
backwards: boolean,
loop = false,
): HTMLElement | undefined => {
if (nodes.length === 0 || !activeNode) {
return undefined;
}
const currentIndex = nodes.indexOf(activeNode);
const nextIndex = currentIndex + (backwards ? -1 : 1);
return backwards
? findPreviousSiblingElement(nodes, nextIndex, loop)
: findNextSiblingElement(nodes, nextIndex, loop);
};
const getInputNavigationResult = (
action: RovingAction | undefined,
nodes: HTMLElement[],
activeNode: HTMLElement | undefined,
shiftKey: boolean,
): NavigationResult => {
if (action !== RovingAction.Tab) {
return { handled: false };
}
return {
handled: true,
focusNode: getAdjacentFocusNode(nodes, activeNode, shiftKey),
};
};
const buildStandardNavigationConfig = (
state: IState,
handleHomeEnd: boolean,
handleUpDown: boolean,
handleLeftRight: boolean,
handleLoop: boolean,
): Record<RovingAction, StandardNavigationConfig> => ({
[RovingAction.Home]: {
enabled: handleHomeEnd,
getFocusNode: (currentState) => findNextSiblingElement(currentState.nodes, 0),
},
[RovingAction.End]: {
enabled: handleHomeEnd,
getFocusNode: (currentState) => findPreviousSiblingElement(currentState.nodes, currentState.nodes.length - 1),
},
[RovingAction.ArrowDown]: {
enabled: handleUpDown,
getFocusNode: (currentState) =>
getAdjacentFocusNode(currentState.nodes, currentState.activeNode, false, handleLoop),
},
[RovingAction.ArrowRight]: {
enabled: handleLeftRight,
getFocusNode: (currentState) =>
getAdjacentFocusNode(currentState.nodes, currentState.activeNode, false, handleLoop),
},
[RovingAction.ArrowUp]: {
enabled: handleUpDown,
getFocusNode: (currentState) =>
getAdjacentFocusNode(currentState.nodes, currentState.activeNode, true, handleLoop),
},
[RovingAction.ArrowLeft]: {
enabled: handleLeftRight,
getFocusNode: (currentState) =>
getAdjacentFocusNode(currentState.nodes, currentState.activeNode, true, handleLoop),
},
[RovingAction.Tab]: {
enabled: false,
getFocusNode: () => undefined,
},
});
const getStandardNavigationResult = (
action: RovingAction | undefined,
state: IState,
handleHomeEnd: boolean,
handleUpDown: boolean,
handleLeftRight: boolean,
handleLoop: boolean,
): NavigationResult => {
if (!action) {
return { handled: false };
}
const config = buildStandardNavigationConfig(state, handleHomeEnd, handleUpDown, handleLeftRight, handleLoop)[
action
];
if (!config?.enabled) {
return { handled: false };
}
return {
handled: true,
focusNode: config.getFocusNode(state),
};
};
/**
* Provides shared roving tabindex state and keyboard handling for a group of
* focusable descendants.
*/
export const RovingTabIndexProvider: React.FC<RovingTabIndexProviderProps> = ({
children,
handleHomeEnd,
handleUpDown,
handleLeftRight,
handleLoop,
handleInputFields,
scrollIntoView,
onKeyDown,
getAction = getDefaultAction,
}) => {
const [state, dispatch] = useReducer(reducer, {
nodes: [],
});
const context = useMemo<IContext>(() => ({ state, dispatch }), [state]);
const onKeyDownHandler = useCallback(
(ev: KeyboardEvent) => {
if (onKeyDown) {
onKeyDown(ev, context.state, context.dispatch);
if (ev.defaultPrevented) {
return;
}
}
const action = getAction(ev);
// Don't interfere with input default keydown behaviour
// but allow people to move focus from it with Tab.
const isInputTarget = !handleInputFields && checkInputableElement(ev.target as HTMLElement);
const { handled, focusNode } = isInputTarget
? getInputNavigationResult(action, context.state.nodes, context.state.activeNode, ev.shiftKey)
: getStandardNavigationResult(
action,
context.state,
handleHomeEnd ?? false,
handleUpDown ?? false,
handleLeftRight ?? false,
handleLoop ?? false,
);
if (handled) {
ev.preventDefault();
ev.stopPropagation();
}
if (focusNode) {
focusNode.focus();
// programmatic focus doesn't fire the onFocus handler, so we must do the do ourselves
dispatch({
type: RovingStateActionType.SetFocus,
payload: {
node: focusNode,
},
});
if (scrollIntoView) {
focusNode.scrollIntoView(scrollIntoView);
}
}
},
[
context,
getAction,
onKeyDown,
handleHomeEnd,
handleUpDown,
handleLeftRight,
handleLoop,
handleInputFields,
scrollIntoView,
],
);
const onDragEndHandler = useCallback(() => {
dispatch({
type: RovingStateActionType.Update,
});
}, []);
return (
<RovingTabIndexContext.Provider value={context}>
{children({ onKeyDownHandler, onDragEndHandler })}
</RovingTabIndexContext.Provider>
);
};
/**
* Registers a focusable element with the nearest
* {@link RovingTabIndexContext}.
*
* @param inputRef - Optional ref to reuse for the registered DOM node.
* @returns A tuple containing:
* `onFocus` to mark the item active,
* `isActive` to drive `tabIndex`,
* `ref` to register the DOM node,
* and `nodeRef` pointing at the registered node.
*/
export const useRovingTabIndex = <T extends HTMLElement>(
inputRef?: RefObject<T | null>,
): [() => void, boolean, RefCallback<T>, RefObject<T | null>] => {
const context = useContext(RovingTabIndexContext);
let nodeRef = useRef<T | null>(null);
if (inputRef) {
// if we are given a ref, use it instead of ours
nodeRef = inputRef;
}
const ref = useCallback((node: T | null) => {
if (node) {
nodeRef.current = node;
context.dispatch({
type: RovingStateActionType.Register,
payload: { node },
});
} else {
context.dispatch({
type: RovingStateActionType.Unregister,
payload: { node: nodeRef.current! },
});
nodeRef.current = null;
}
}, []); // eslint-disable-line react-hooks/exhaustive-deps
const onFocus = useCallback(() => {
if (!nodeRef.current) {
console.warn("useRovingTabIndex.onFocus called but the react ref does not point to any DOM element!");
return;
}
context.dispatch({
type: RovingStateActionType.SetFocus,
payload: { node: nodeRef.current },
});
}, []); // eslint-disable-line react-hooks/exhaustive-deps
// eslint-disable-next-line react-compiler/react-compiler
const isActive = context.state.activeNode === nodeRef.current;
return [onFocus, isActive, ref, nodeRef];
};
@@ -0,0 +1,32 @@
/*
* Copyright 2026 Element Creations Ltd.
*
* SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
* Please see LICENSE files in the repository root for full details.
*/
import { type ReactElement, type RefCallback, type RefObject } from "react";
import type React from "react";
import { useRovingTabIndex } from "./RovingTabIndex";
interface IProps {
inputRef?: RefObject<HTMLElement | null>;
children(
this: void,
renderProps: {
onFocus: () => void;
isActive: boolean;
ref: RefCallback<HTMLElement>;
},
): ReactElement;
}
/**
* Render-prop wrapper around {@link useRovingTabIndex} for class components and
* other places where hooks cannot be called directly.
*/
export const RovingTabIndexWrapper: React.FC<IProps> = ({ children, inputRef }) => {
const [onFocus, isActive, ref] = useRovingTabIndex(inputRef);
return children({ onFocus, isActive, ref });
};
@@ -0,0 +1,18 @@
/*
* Copyright 2026 Element Creations Ltd.
*
* SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
* Please see LICENSE files in the repository root for full details.
*/
export {
checkInputableElement,
findNextSiblingElement,
RovingAction,
RovingStateActionType,
RovingTabIndexContext,
RovingTabIndexProvider,
useRovingTabIndex,
} from "./RovingTabIndex";
export type { IAction, IContext, IState, RovingTabIndexProviderProps } from "./RovingTabIndex";
export { RovingTabIndexWrapper } from "./RovingTabIndexWrapper";
+1
View File
@@ -10,6 +10,7 @@ export * from "./audio/Clock";
export * from "./audio/PlayPauseButton"; export * from "./audio/PlayPauseButton";
export * from "./audio/SeekBar"; export * from "./audio/SeekBar";
export * from "./core/AvatarWithDetails"; export * from "./core/AvatarWithDetails";
export * from "./core/roving";
export * from "./room/composer/Banner"; export * from "./room/composer/Banner";
export * from "./crypto/SasEmoji"; export * from "./crypto/SasEmoji";
export * from "./room/timeline/ReadMarker"; export * from "./room/timeline/ReadMarker";
@@ -5,9 +5,11 @@
* Please see LICENSE files in the repository root for full details. * Please see LICENSE files in the repository root for full details.
*/ */
import React, { type JSX } from "react"; import React, { type JSX, useLayoutEffect, useRef } from "react";
import { useMergeRefs } from "react-merge-refs";
import { Button, Tooltip } from "@vector-im/compound-web"; import { Button, Tooltip } from "@vector-im/compound-web";
import { useRovingTabIndex } from "../../../../../core/roving";
import styles from "./ActionBarView.module.css"; import styles from "./ActionBarView.module.css";
interface ActionBarButtonProps { interface ActionBarButtonProps {
@@ -36,6 +38,16 @@ export function ActionBarButton({
tooltipCaption, tooltipCaption,
}: Readonly<ActionBarButtonProps>): JSX.Element { }: Readonly<ActionBarButtonProps>): JSX.Element {
const iconOnly = presentation === "icon"; const iconOnly = presentation === "icon";
const [onFocus, isActive, rovingRef] = useRovingTabIndex<HTMLButtonElement>();
const localRef = useRef<HTMLButtonElement | null>(null);
const ref = useMergeRefs([buttonRef, localRef, disabled ? null : rovingRef]);
const tabIndex = disabled || !isActive ? -1 : 0;
useLayoutEffect(() => {
if (!localRef.current) return;
localRef.current.tabIndex = tabIndex;
}, [tabIndex]);
const handleContextMenu = (event: React.MouseEvent<HTMLButtonElement>): void => { const handleContextMenu = (event: React.MouseEvent<HTMLButtonElement>): void => {
event.preventDefault(); event.preventDefault();
@@ -47,7 +59,7 @@ export function ActionBarButton({
<Tooltip description={tooltipDescription ?? label} caption={tooltipCaption} placement="top"> <Tooltip description={tooltipDescription ?? label} caption={tooltipCaption} placement="top">
<Button <Button
data-presentation={presentation} data-presentation={presentation}
ref={buttonRef} ref={ref}
kind="tertiary" kind="tertiary"
size="sm" size="sm"
iconOnly={iconOnly} iconOnly={iconOnly}
@@ -57,6 +69,7 @@ export function ActionBarButton({
disabled={disabled} disabled={disabled}
onClick={(event) => onActivate?.(event.currentTarget)} onClick={(event) => onActivate?.(event.currentTarget)}
onContextMenu={handleContextMenu} onContextMenu={handleContextMenu}
onFocus={disabled ? undefined : onFocus}
className={styles.toolbar_item} className={styles.toolbar_item}
Icon={iconOnly ? icon : undefined} Icon={iconOnly ? icon : undefined}
> >
@@ -5,7 +5,7 @@
* Please see LICENSE files in the repository root for full details. * Please see LICENSE files in the repository root for full details.
*/ */
import React, { type JSX, useCallback, useLayoutEffect, useMemo, useRef, useState } from "react"; import React, { type JSX, useCallback, useMemo, useRef } from "react";
import classNames from "classnames"; import classNames from "classnames";
import { import {
CollapseIcon, CollapseIcon,
@@ -27,6 +27,7 @@ import {
} from "@vector-im/compound-design-tokens/assets/web/icons"; } from "@vector-im/compound-design-tokens/assets/web/icons";
import { InlineSpinner } from "@vector-im/compound-web"; import { InlineSpinner } from "@vector-im/compound-web";
import { RovingTabIndexProvider } from "../../../../../core/roving";
import { useI18n } from "../../../../../core/i18n/i18nContext"; import { useI18n } from "../../../../../core/i18n/i18nContext";
import { Flex } from "../../../../../core/utils/Flex"; import { Flex } from "../../../../../core/utils/Flex";
import { type ViewModel, useViewModel } from "../../../../../core/viewmodel"; import { type ViewModel, useViewModel } from "../../../../../core/viewmodel";
@@ -131,7 +132,6 @@ interface ActionBarViewProps {
*/ */
export function ActionBarView({ vm, className }: Readonly<ActionBarViewProps>): JSX.Element | null { export function ActionBarView({ vm, className }: Readonly<ActionBarViewProps>): JSX.Element | null {
const { translate: _t } = useI18n(); const { translate: _t } = useI18n();
const [activeIndex, setActiveIndex] = useState(0);
const { const {
actions, actions,
presentation = "icon", presentation = "icon",
@@ -364,79 +364,9 @@ export function ActionBarView({ vm, className }: Readonly<ActionBarViewProps>):
disabled: isActionDisabled(action), disabled: isActionDisabled(action),
})); }));
}, [actions, isActionDisabled]); }, [actions, isActionDisabled]);
const rovingProviderKey = toolbarButtons
// Handle RovingIndex for toolbar .map(({ action, disabled }) => `${action}:${disabled ? "1" : "0"}`)
const enabledIndices = toolbarButtons .join("|");
.map((item, index) => (item.disabled ? -1 : index))
.filter((index) => index >= 0);
const fallbackIndex = enabledIndices[0] ?? 0;
const currentIndex =
toolbarButtons[activeIndex] && !toolbarButtons[activeIndex].disabled ? activeIndex : fallbackIndex;
useLayoutEffect(() => {
setActiveIndex(currentIndex);
toolbarButtons.forEach(({ action }, index) => {
const button = actionButtonRefs.current[action] ?? null;
if (button) {
button.tabIndex = index === currentIndex ? 0 : -1;
}
});
}, [currentIndex, toolbarButtons]);
const focusButtonAtIndex = (index: number): void => {
const action = toolbarButtons[index]?.action;
const button = action ? (actionButtonRefs.current[action] ?? null) : null;
if (!button) {
return;
}
setActiveIndex(index);
button.focus();
};
const handleToolbarKeyDown = (event: React.KeyboardEvent<HTMLDivElement>): void => {
if (enabledIndices.length === 0) {
return;
}
const focusedIndex = toolbarButtons.findIndex(
({ action }) => actionButtonRefs.current[action] === document.activeElement,
);
const startIndex = focusedIndex >= 0 ? focusedIndex : currentIndex;
switch (event.key) {
case "ArrowRight": {
event.preventDefault();
const nextIndex = enabledIndices.find((index) => index > startIndex) ?? enabledIndices[0];
focusButtonAtIndex(nextIndex);
break;
}
case "ArrowLeft": {
event.preventDefault();
const previousIndex = [...enabledIndices].reverse().find((index) => index < startIndex);
focusButtonAtIndex(previousIndex ?? enabledIndices[enabledIndices.length - 1]);
break;
}
case "Home":
event.preventDefault();
focusButtonAtIndex(enabledIndices[0]);
break;
case "End":
event.preventDefault();
focusButtonAtIndex(enabledIndices[enabledIndices.length - 1]);
break;
}
};
const handleToolbarFocusCapture = (): void => {
const focusedIndex = toolbarButtons.findIndex(
({ action }) => actionButtonRefs.current[action] === document.activeElement,
);
if (focusedIndex >= 0 && focusedIndex !== activeIndex) {
setActiveIndex(focusedIndex);
}
};
if (toolbarButtons.length === 0) { if (toolbarButtons.length === 0) {
return null; return null;
@@ -444,17 +374,20 @@ export function ActionBarView({ vm, className }: Readonly<ActionBarViewProps>):
// aria-live=off to not have this read out automatically as navigating around timeline, gets repetitive. // aria-live=off to not have this read out automatically as navigating around timeline, gets repetitive.
return ( return (
<Flex <RovingTabIndexProvider key={rovingProviderKey} handleLeftRight handleHomeEnd handleLoop>
display="inline-flex" {({ onKeyDownHandler }) => (
direction="row" <Flex
role="toolbar" display="inline-flex"
aria-label={_t("timeline|mab|label")} direction="row"
aria-live="off" role="toolbar"
onKeyDown={handleToolbarKeyDown} aria-label={_t("timeline|mab|label")}
onFocusCapture={handleToolbarFocusCapture} aria-live="off"
className={classNames(className, styles.toolbar)} onKeyDown={onKeyDownHandler}
> className={classNames(className, styles.toolbar)}
{toolbarButtons.map((meta) => actionButtons[meta.action])} >
</Flex> {toolbarButtons.map((meta) => actionButtons[meta.action])}
</Flex>
)}
</RovingTabIndexProvider>
); );
} }