matrix-react-sdk
Version:
SDK for matrix.org using React
323 lines (313 loc) • 46.8 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
Object.defineProperty(exports, "RovingAccessibleButton", {
enumerable: true,
get: function () {
return _RovingAccessibleButton.RovingAccessibleButton;
}
});
exports.RovingTabIndexProvider = exports.RovingTabIndexContext = void 0;
Object.defineProperty(exports, "RovingTabIndexWrapper", {
enumerable: true,
get: function () {
return _RovingTabIndexWrapper.RovingTabIndexWrapper;
}
});
exports.Type = void 0;
exports.checkInputableElement = checkInputableElement;
exports.useRovingTabIndex = exports.reducer = exports.findSiblingElement = void 0;
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _react = _interopRequireWildcard(require("react"));
var _KeyBindingsManager = require("../KeyBindingsManager");
var _KeyboardShortcuts = require("./KeyboardShortcuts");
var _RovingTabIndexWrapper = require("./roving/RovingTabIndexWrapper");
var _RovingAccessibleButton = require("./roving/RovingAccessibleButton");
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && {}.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { (0, _defineProperty2.default)(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; } /*
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
Please see LICENSE files in the repository root for full details.
*/
/**
* Module to simplify implementing the Roving TabIndex accessibility technique
*
* Wrap the Widget in an RovingTabIndexContextProvider
* and then for all buttons make use of useRovingTabIndex or RovingTabIndexWrapper.
* The code will keep track of which tabIndex was most recently focused and expose that information as `isActive` which
* can then be used to only set the tabIndex to 0 as expected by the roving tabindex technique.
* When the active button gets unmounted the closest button will be chosen as expected.
* Initially the first button to mount will be given active state.
*
* 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
// like many of the text input varieties.
//
// i.e. it's ok to press the down arrow on a radio button to move to the next
// radio. But it's not ok to press the down arrow on a <input type="text"> to
// move away because the down arrow should move the cursor to the end of the
// input.
function checkInputableElement(el) {
return el.matches('input:not([type="radio"]):not([type="checkbox"]), textarea, select, [contenteditable=true]');
}
const RovingTabIndexContext = exports.RovingTabIndexContext = /*#__PURE__*/(0, _react.createContext)({
state: {
refs: [] // list of refs in DOM order
},
dispatch: () => {}
});
RovingTabIndexContext.displayName = "RovingTabIndexContext";
let Type = exports.Type = /*#__PURE__*/function (Type) {
Type["Register"] = "REGISTER";
Type["Unregister"] = "UNREGISTER";
Type["SetFocus"] = "SET_FOCUS";
Type["Update"] = "UPDATE";
return Type;
}({});
const refSorter = (a, b) => {
if (a === b) {
return 0;
}
const position = a.current.compareDocumentPosition(b.current);
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 reducer = (state, action) => {
switch (action.type) {
case Type.Register:
{
if (!state.activeRef) {
// Our list of refs was empty, set activeRef to this first item
state.activeRef = action.payload.ref;
}
// Sadly due to the potential of DOM elements swapping order we can't do anything fancy like a binary insert
state.refs.push(action.payload.ref);
state.refs.sort(refSorter);
return _objectSpread({}, state);
}
case Type.Unregister:
{
const oldIndex = state.refs.findIndex(r => r === action.payload.ref);
if (oldIndex === -1) {
return state; // already removed, this should not happen
}
if (state.refs.splice(oldIndex, 1)[0] === state.activeRef) {
// we just removed the active ref, need to replace it
// pick the ref closest to the index the old ref was in
if (oldIndex >= state.refs.length) {
state.activeRef = findSiblingElement(state.refs, state.refs.length - 1, true);
} else {
state.activeRef = findSiblingElement(state.refs, oldIndex) || findSiblingElement(state.refs, 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.activeRef?.current?.focus(), 0);
}
}
// update the refs list
return _objectSpread({}, state);
}
case Type.SetFocus:
{
// if the ref doesn't change just return the same object reference to skip a re-render
if (state.activeRef === action.payload.ref) return state;
// update active ref
state.activeRef = action.payload.ref;
return _objectSpread({}, state);
}
case Type.Update:
{
state.refs.sort(refSorter);
return _objectSpread({}, state);
}
default:
return state;
}
};
exports.reducer = reducer;
const findSiblingElement = (refs, startIndex, backwards = false, loop = false) => {
if (backwards) {
for (let i = startIndex; i < refs.length && i >= 0; i--) {
if (refs[i].current?.offsetParent !== null) {
return refs[i];
}
}
if (loop) {
return findSiblingElement(refs.slice(startIndex + 1), refs.length - 1, true, false);
}
} else {
for (let i = startIndex; i < refs.length && i >= 0; i++) {
if (refs[i].current?.offsetParent !== null) {
return refs[i];
}
}
if (loop) {
return findSiblingElement(refs.slice(0, startIndex), 0, false, false);
}
}
};
exports.findSiblingElement = findSiblingElement;
const RovingTabIndexProvider = ({
children,
handleHomeEnd,
handleUpDown,
handleLeftRight,
handleLoop,
handleInputFields,
scrollIntoView,
onKeyDown
}) => {
const [state, dispatch] = (0, _react.useReducer)(reducer, {
refs: []
});
const context = (0, _react.useMemo)(() => ({
state,
dispatch
}), [state]);
const onKeyDownHandler = (0, _react.useCallback)(ev => {
if (onKeyDown) {
onKeyDown(ev, context.state, context.dispatch);
if (ev.defaultPrevented) {
return;
}
}
let handled = false;
const action = (0, _KeyBindingsManager.getKeyBindingsManager)().getAccessibilityAction(ev);
let focusRef;
// Don't interfere with input default keydown behaviour
// but allow people to move focus from it with Tab.
if (!handleInputFields && checkInputableElement(ev.target)) {
switch (action) {
case _KeyboardShortcuts.KeyBindingAction.Tab:
handled = true;
if (context.state.refs.length > 0) {
const idx = context.state.refs.indexOf(context.state.activeRef);
focusRef = findSiblingElement(context.state.refs, idx + (ev.shiftKey ? -1 : 1), ev.shiftKey);
}
break;
}
} else {
// check if we actually have any items
switch (action) {
case _KeyboardShortcuts.KeyBindingAction.Home:
if (handleHomeEnd) {
handled = true;
// move focus to first (visible) item
focusRef = findSiblingElement(context.state.refs, 0);
}
break;
case _KeyboardShortcuts.KeyBindingAction.End:
if (handleHomeEnd) {
handled = true;
// move focus to last (visible) item
focusRef = findSiblingElement(context.state.refs, context.state.refs.length - 1, true);
}
break;
case _KeyboardShortcuts.KeyBindingAction.ArrowDown:
case _KeyboardShortcuts.KeyBindingAction.ArrowRight:
if (action === _KeyboardShortcuts.KeyBindingAction.ArrowDown && handleUpDown || action === _KeyboardShortcuts.KeyBindingAction.ArrowRight && handleLeftRight) {
handled = true;
if (context.state.refs.length > 0) {
const idx = context.state.refs.indexOf(context.state.activeRef);
focusRef = findSiblingElement(context.state.refs, idx + 1, false, handleLoop);
}
}
break;
case _KeyboardShortcuts.KeyBindingAction.ArrowUp:
case _KeyboardShortcuts.KeyBindingAction.ArrowLeft:
if (action === _KeyboardShortcuts.KeyBindingAction.ArrowUp && handleUpDown || action === _KeyboardShortcuts.KeyBindingAction.ArrowLeft && handleLeftRight) {
handled = true;
if (context.state.refs.length > 0) {
const idx = context.state.refs.indexOf(context.state.activeRef);
focusRef = findSiblingElement(context.state.refs, idx - 1, true, handleLoop);
}
}
break;
}
}
if (handled) {
ev.preventDefault();
ev.stopPropagation();
}
if (focusRef) {
focusRef.current?.focus();
// programmatic focus doesn't fire the onFocus handler, so we must do the do ourselves
dispatch({
type: Type.SetFocus,
payload: {
ref: focusRef
}
});
if (scrollIntoView) {
focusRef.current?.scrollIntoView(scrollIntoView);
}
}
}, [context, onKeyDown, handleHomeEnd, handleUpDown, handleLeftRight, handleLoop, handleInputFields, scrollIntoView]);
const onDragEndHandler = (0, _react.useCallback)(() => {
dispatch({
type: Type.Update
});
}, []);
return /*#__PURE__*/_react.default.createElement(RovingTabIndexContext.Provider, {
value: context
}, children({
onKeyDownHandler,
onDragEndHandler
}));
};
// Hook to register a roving tab index
// inputRef parameter specifies the ref to use
// 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 should be passed to a DOM node which will be used for DOM compareDocumentPosition
exports.RovingTabIndexProvider = RovingTabIndexProvider;
const useRovingTabIndex = inputRef => {
const context = (0, _react.useContext)(RovingTabIndexContext);
let ref = (0, _react.useRef)(null);
if (inputRef) {
// if we are given a ref, use it instead of ours
ref = inputRef;
}
// setup (after refs)
(0, _react.useEffect)(() => {
context.dispatch({
type: Type.Register,
payload: {
ref
}
});
// teardown
return () => {
context.dispatch({
type: Type.Unregister,
payload: {
ref
}
});
};
}, []); // eslint-disable-line react-hooks/exhaustive-deps
const onFocus = (0, _react.useCallback)(() => {
context.dispatch({
type: Type.SetFocus,
payload: {
ref
}
});
}, []); // eslint-disable-line react-hooks/exhaustive-deps
const isActive = context.state.activeRef === ref;
return [onFocus, isActive, ref];
};
// re-export the semantic helper components for simplicity
exports.useRovingTabIndex = useRovingTabIndex;
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["_react","_interopRequireWildcard","require","_KeyBindingsManager","_KeyboardShortcuts","_RovingTabIndexWrapper","_RovingAccessibleButton","_getRequireWildcardCache","e","WeakMap","r","t","__esModule","default","has","get","n","__proto__","a","Object","defineProperty","getOwnPropertyDescriptor","u","hasOwnProperty","call","i","set","ownKeys","keys","getOwnPropertySymbols","o","filter","enumerable","push","apply","_objectSpread","arguments","length","forEach","_defineProperty2","getOwnPropertyDescriptors","defineProperties","checkInputableElement","el","matches","RovingTabIndexContext","exports","createContext","state","refs","dispatch","displayName","Type","refSorter","b","position","current","compareDocumentPosition","Node","DOCUMENT_POSITION_FOLLOWING","DOCUMENT_POSITION_CONTAINED_BY","DOCUMENT_POSITION_PRECEDING","DOCUMENT_POSITION_CONTAINS","reducer","action","type","Register","activeRef","payload","ref","sort","Unregister","oldIndex","findIndex","splice","findSiblingElement","document","activeElement","body","setTimeout","focus","SetFocus","Update","startIndex","backwards","loop","offsetParent","slice","RovingTabIndexProvider","children","handleHomeEnd","handleUpDown","handleLeftRight","handleLoop","handleInputFields","scrollIntoView","onKeyDown","useReducer","context","useMemo","onKeyDownHandler","useCallback","ev","defaultPrevented","handled","getKeyBindingsManager","getAccessibilityAction","focusRef","target","KeyBindingAction","Tab","idx","indexOf","shiftKey","Home","End","ArrowDown","ArrowRight","ArrowUp","ArrowLeft","preventDefault","stopPropagation","onDragEndHandler","createElement","Provider","value","useRovingTabIndex","inputRef","useContext","useRef","useEffect","onFocus","isActive"],"sources":["../../src/accessibility/RovingTabIndex.tsx"],"sourcesContent":["/*\nCopyright 2024 New Vector Ltd.\nCopyright 2020 The Matrix.org Foundation C.I.C.\n\nSPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only\nPlease see LICENSE files in the repository root for full details.\n*/\n\nimport React, {\n    createContext,\n    useCallback,\n    useContext,\n    useEffect,\n    useMemo,\n    useRef,\n    useReducer,\n    Reducer,\n    Dispatch,\n    RefObject,\n    ReactNode,\n} from \"react\";\n\nimport { getKeyBindingsManager } from \"../KeyBindingsManager\";\nimport { KeyBindingAction } from \"./KeyboardShortcuts\";\nimport { FocusHandler, Ref } from \"./roving/types\";\n\n/**\n * Module to simplify implementing the Roving TabIndex accessibility technique\n *\n * Wrap the Widget in an RovingTabIndexContextProvider\n * and then for all buttons make use of useRovingTabIndex or RovingTabIndexWrapper.\n * The code will keep track of which tabIndex was most recently focused and expose that information as `isActive` which\n * can then be used to only set the tabIndex to 0 as expected by the roving tabindex technique.\n * When the active button gets unmounted the closest button will be chosen as expected.\n * Initially the first button to mount will be given active state.\n *\n * https://developer.mozilla.org/en-US/docs/Web/Accessibility/Keyboard-navigable_JavaScript_widgets#Technique_1_Roving_tabindex\n */\n\n// Check for form elements which utilize the arrow keys for native functions\n// like many of the text input varieties.\n//\n// i.e. it's ok to press the down arrow on a radio button to move to the next\n// radio. But it's not ok to press the down arrow on a <input type=\"text\"> to\n// move away because the down arrow should move the cursor to the end of the\n// input.\nexport function checkInputableElement(el: HTMLElement): boolean {\n    return el.matches('input:not([type=\"radio\"]):not([type=\"checkbox\"]), textarea, select, [contenteditable=true]');\n}\n\nexport interface IState {\n    activeRef?: Ref;\n    refs: Ref[];\n}\n\nexport interface IContext {\n    state: IState;\n    dispatch: Dispatch<IAction>;\n}\n\nexport const RovingTabIndexContext = createContext<IContext>({\n    state: {\n        refs: [], // list of refs in DOM order\n    },\n    dispatch: () => {},\n});\nRovingTabIndexContext.displayName = \"RovingTabIndexContext\";\n\nexport enum Type {\n    Register = \"REGISTER\",\n    Unregister = \"UNREGISTER\",\n    SetFocus = \"SET_FOCUS\",\n    Update = \"UPDATE\",\n}\n\nexport interface IAction {\n    type: Exclude<Type, Type.Update>;\n    payload: {\n        ref: Ref;\n    };\n}\n\ninterface UpdateAction {\n    type: Type.Update;\n    payload?: undefined;\n}\n\ntype Action = IAction | UpdateAction;\n\nconst refSorter = (a: Ref, b: Ref): number => {\n    if (a === b) {\n        return 0;\n    }\n\n    const position = a.current!.compareDocumentPosition(b.current!);\n\n    if (position & Node.DOCUMENT_POSITION_FOLLOWING || position & Node.DOCUMENT_POSITION_CONTAINED_BY) {\n        return -1;\n    } else if (position & Node.DOCUMENT_POSITION_PRECEDING || position & Node.DOCUMENT_POSITION_CONTAINS) {\n        return 1;\n    } else {\n        return 0;\n    }\n};\n\nexport const reducer: Reducer<IState, Action> = (state: IState, action: Action) => {\n    switch (action.type) {\n        case Type.Register: {\n            if (!state.activeRef) {\n                // Our list of refs was empty, set activeRef to this first item\n                state.activeRef = action.payload.ref;\n            }\n\n            // Sadly due to the potential of DOM elements swapping order we can't do anything fancy like a binary insert\n            state.refs.push(action.payload.ref);\n            state.refs.sort(refSorter);\n\n            return { ...state };\n        }\n\n        case Type.Unregister: {\n            const oldIndex = state.refs.findIndex((r) => r === action.payload.ref);\n\n            if (oldIndex === -1) {\n                return state; // already removed, this should not happen\n            }\n\n            if (state.refs.splice(oldIndex, 1)[0] === state.activeRef) {\n                // we just removed the active ref, need to replace it\n                // pick the ref closest to the index the old ref was in\n                if (oldIndex >= state.refs.length) {\n                    state.activeRef = findSiblingElement(state.refs, state.refs.length - 1, true);\n                } else {\n                    state.activeRef =\n                        findSiblingElement(state.refs, oldIndex) || findSiblingElement(state.refs, oldIndex, true);\n                }\n                if (document.activeElement === document.body) {\n                    // if the focus got reverted to the body then the user was likely focused on the unmounted element\n                    setTimeout(() => state.activeRef?.current?.focus(), 0);\n                }\n            }\n\n            // update the refs list\n            return { ...state };\n        }\n\n        case Type.SetFocus: {\n            // if the ref doesn't change just return the same object reference to skip a re-render\n            if (state.activeRef === action.payload.ref) return state;\n            // update active ref\n            state.activeRef = action.payload.ref;\n            return { ...state };\n        }\n\n        case Type.Update: {\n            state.refs.sort(refSorter);\n            return { ...state };\n        }\n\n        default:\n            return state;\n    }\n};\n\ninterface IProps {\n    handleLoop?: boolean;\n    handleHomeEnd?: boolean;\n    handleUpDown?: boolean;\n    handleLeftRight?: boolean;\n    handleInputFields?: boolean;\n    scrollIntoView?: boolean | ScrollIntoViewOptions;\n    children(renderProps: { onKeyDownHandler(ev: React.KeyboardEvent): void; onDragEndHandler(): void }): ReactNode;\n    onKeyDown?(ev: React.KeyboardEvent, state: IState, dispatch: Dispatch<IAction>): void;\n}\n\nexport const findSiblingElement = (\n    refs: RefObject<HTMLElement>[],\n    startIndex: number,\n    backwards = false,\n    loop = false,\n): RefObject<HTMLElement> | undefined => {\n    if (backwards) {\n        for (let i = startIndex; i < refs.length && i >= 0; i--) {\n            if (refs[i].current?.offsetParent !== null) {\n                return refs[i];\n            }\n        }\n        if (loop) {\n            return findSiblingElement(refs.slice(startIndex + 1), refs.length - 1, true, false);\n        }\n    } else {\n        for (let i = startIndex; i < refs.length && i >= 0; i++) {\n            if (refs[i].current?.offsetParent !== null) {\n                return refs[i];\n            }\n        }\n        if (loop) {\n            return findSiblingElement(refs.slice(0, startIndex), 0, false, false);\n        }\n    }\n};\n\nexport const RovingTabIndexProvider: React.FC<IProps> = ({\n    children,\n    handleHomeEnd,\n    handleUpDown,\n    handleLeftRight,\n    handleLoop,\n    handleInputFields,\n    scrollIntoView,\n    onKeyDown,\n}) => {\n    const [state, dispatch] = useReducer<Reducer<IState, Action>>(reducer, {\n        refs: [],\n    });\n\n    const context = useMemo<IContext>(() => ({ state, dispatch }), [state]);\n\n    const onKeyDownHandler = useCallback(\n        (ev: React.KeyboardEvent) => {\n            if (onKeyDown) {\n                onKeyDown(ev, context.state, context.dispatch);\n                if (ev.defaultPrevented) {\n                    return;\n                }\n            }\n\n            let handled = false;\n            const action = getKeyBindingsManager().getAccessibilityAction(ev);\n            let focusRef: RefObject<HTMLElement> | undefined;\n            // Don't interfere with input default keydown behaviour\n            // but allow people to move focus from it with Tab.\n            if (!handleInputFields && checkInputableElement(ev.target as HTMLElement)) {\n                switch (action) {\n                    case KeyBindingAction.Tab:\n                        handled = true;\n                        if (context.state.refs.length > 0) {\n                            const idx = context.state.refs.indexOf(context.state.activeRef!);\n                            focusRef = findSiblingElement(\n                                context.state.refs,\n                                idx + (ev.shiftKey ? -1 : 1),\n                                ev.shiftKey,\n                            );\n                        }\n                        break;\n                }\n            } else {\n                // check if we actually have any items\n                switch (action) {\n                    case KeyBindingAction.Home:\n                        if (handleHomeEnd) {\n                            handled = true;\n                            // move focus to first (visible) item\n                            focusRef = findSiblingElement(context.state.refs, 0);\n                        }\n                        break;\n\n                    case KeyBindingAction.End:\n                        if (handleHomeEnd) {\n                            handled = true;\n                            // move focus to last (visible) item\n                            focusRef = findSiblingElement(context.state.refs, context.state.refs.length - 1, true);\n                        }\n                        break;\n\n                    case KeyBindingAction.ArrowDown:\n                    case KeyBindingAction.ArrowRight:\n                        if (\n                            (action === KeyBindingAction.ArrowDown && handleUpDown) ||\n                            (action === KeyBindingAction.ArrowRight && handleLeftRight)\n                        ) {\n                            handled = true;\n                            if (context.state.refs.length > 0) {\n                                const idx = context.state.refs.indexOf(context.state.activeRef!);\n                                focusRef = findSiblingElement(context.state.refs, idx + 1, false, handleLoop);\n                            }\n                        }\n                        break;\n\n                    case KeyBindingAction.ArrowUp:\n                    case KeyBindingAction.ArrowLeft:\n                        if (\n                            (action === KeyBindingAction.ArrowUp && handleUpDown) ||\n                            (action === KeyBindingAction.ArrowLeft && handleLeftRight)\n                        ) {\n                            handled = true;\n                            if (context.state.refs.length > 0) {\n                                const idx = context.state.refs.indexOf(context.state.activeRef!);\n                                focusRef = findSiblingElement(context.state.refs, idx - 1, true, handleLoop);\n                            }\n                        }\n                        break;\n                }\n            }\n\n            if (handled) {\n                ev.preventDefault();\n                ev.stopPropagation();\n            }\n\n            if (focusRef) {\n                focusRef.current?.focus();\n                // programmatic focus doesn't fire the onFocus handler, so we must do the do ourselves\n                dispatch({\n                    type: Type.SetFocus,\n                    payload: {\n                        ref: focusRef,\n                    },\n                });\n                if (scrollIntoView) {\n                    focusRef.current?.scrollIntoView(scrollIntoView);\n                }\n            }\n        },\n        [\n            context,\n            onKeyDown,\n            handleHomeEnd,\n            handleUpDown,\n            handleLeftRight,\n            handleLoop,\n            handleInputFields,\n            scrollIntoView,\n        ],\n    );\n\n    const onDragEndHandler = useCallback(() => {\n        dispatch({\n            type: Type.Update,\n        });\n    }, []);\n\n    return (\n        <RovingTabIndexContext.Provider value={context}>\n            {children({ onKeyDownHandler, onDragEndHandler })}\n        </RovingTabIndexContext.Provider>\n    );\n};\n\n// Hook to register a roving tab index\n// inputRef parameter specifies the ref to use\n// onFocus should be called when the index gained focus in any manner\n// isActive should be used to set tabIndex in a manner such as `tabIndex={isActive ? 0 : -1}`\n// ref should be passed to a DOM node which will be used for DOM compareDocumentPosition\nexport const useRovingTabIndex = <T extends HTMLElement>(\n    inputRef?: RefObject<T>,\n): [FocusHandler, boolean, RefObject<T>] => {\n    const context = useContext(RovingTabIndexContext);\n    let ref = useRef<T>(null);\n\n    if (inputRef) {\n        // if we are given a ref, use it instead of ours\n        ref = inputRef;\n    }\n\n    // setup (after refs)\n    useEffect(() => {\n        context.dispatch({\n            type: Type.Register,\n            payload: { ref },\n        });\n        // teardown\n        return () => {\n            context.dispatch({\n                type: Type.Unregister,\n                payload: { ref },\n            });\n        };\n    }, []); // eslint-disable-line react-hooks/exhaustive-deps\n\n    const onFocus = useCallback(() => {\n        context.dispatch({\n            type: Type.SetFocus,\n            payload: { ref },\n        });\n    }, []); // eslint-disable-line react-hooks/exhaustive-deps\n\n    const isActive = context.state.activeRef === ref;\n    return [onFocus, isActive, ref];\n};\n\n// re-export the semantic helper components for simplicity\nexport { RovingTabIndexWrapper } from \"./roving/RovingTabIndexWrapper\";\nexport { RovingAccessibleButton } from 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