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feat: use ariaNotify when available for AriaLiveAnnouncer (#31251)
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change/@fluentui-react-aria-7b56d0a2-0299-4c6c-94dc-07533c23d6d6.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| { | ||
| "type": "patch", | ||
| "comment": "feat: use ariaNotify in AriaLiveAnnouncer when available", | ||
| "packageName": "@fluentui/react-aria", | ||
| "email": "[email protected]", | ||
| "dependentChangeType": "patch" | ||
| } |
159 changes: 12 additions & 147 deletions
159
packages/react-components/react-aria/src/AriaLiveAnnouncer/useAriaLiveAnnouncer.ts
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47 changes: 47 additions & 0 deletions
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packages/react-components/react-aria/src/AriaLiveAnnouncer/useAriaNotifyAnnounce.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| import { useFluent_unstable as useFluent } from '@fluentui/react-shared-contexts'; | ||
| import type { AnnounceOptions } from '@fluentui/react-shared-contexts'; | ||
| import * as React from 'react'; | ||
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| import type { AriaLiveAnnounceFn } from './AriaLiveAnnouncer.types'; | ||
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| type AriaNotifyOptions = { | ||
| notificationID?: string; | ||
| priority?: 'none' | 'important'; | ||
| interrupt?: 'all' | 'pending' | 'none'; | ||
| }; | ||
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| type DocumentWithAriaNotify = Document & { | ||
| ariaNotify: (message: string, options: AriaNotifyOptions) => void; | ||
| }; | ||
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| /* INTERNAL: implementation of the announcer using the ariaNotify API */ | ||
| export const useAriaNotifyAnnounce_unstable = (): AriaLiveAnnounceFn => { | ||
| const { targetDocument } = useFluent(); | ||
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| const announce: AriaLiveAnnounceFn = React.useCallback( | ||
| (message: string, options: AnnounceOptions = {}) => { | ||
| if (!targetDocument) { | ||
| return; | ||
| } | ||
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| const { alert = false, polite, batchId } = options; | ||
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| // default priority to 0 if polite, 2 if alert, and 1 by default | ||
| // used to set both ariaNotify's priority and interrupt | ||
| const defaultPriority = polite ? 0 : alert ? 2 : 1; | ||
| const priority = options.priority ?? defaultPriority; | ||
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| // map fluent announce options to ariaNotify options | ||
| const ariaNotifyOptions: AriaNotifyOptions = { | ||
| notificationID: batchId, | ||
| priority: priority > 1 ? 'important' : 'none', | ||
| interrupt: batchId ? (priority > 0 ? 'all' : 'pending') : 'none', | ||
| }; | ||
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| (targetDocument as DocumentWithAriaNotify).ariaNotify(message, ariaNotifyOptions); | ||
| }, | ||
| [targetDocument], | ||
| ); | ||
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| return announce; | ||
| }; |
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packages/react-components/react-aria/src/AriaLiveAnnouncer/useDomAnnounce.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| import { useFluent_unstable as useFluent } from '@fluentui/react-shared-contexts'; | ||
| import type { AnnounceOptions } from '@fluentui/react-shared-contexts'; | ||
| import { createPriorityQueue, useTimeout } from '@fluentui/react-utilities'; | ||
| import * as React from 'react'; | ||
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| import type { AriaLiveAnnounceFn, AriaLiveMessage } from './AriaLiveAnnouncer.types'; | ||
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| /** The duration the message needs to be in present in DOM for screen readers to register a change and announce */ | ||
| const MESSAGE_DURATION = 500; | ||
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| const VISUALLY_HIDDEN_STYLES = { | ||
| clip: 'rect(0px, 0px, 0px, 0px)', | ||
| height: '1px', | ||
| margin: '-1px', | ||
| width: '1px', | ||
| position: 'absolute', | ||
| overflow: 'hidden', | ||
| textWrap: 'nowrap', | ||
| }; | ||
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| /* INTERNAL: implementation of the announcer using a live region element */ | ||
| export const useDomAnnounce_unstable = (): AriaLiveAnnounceFn => { | ||
| const { targetDocument } = useFluent(); | ||
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| const timeoutRef = React.useRef<number | undefined>(undefined); | ||
| const [setAnnounceTimeout, clearAnnounceTimeout] = useTimeout(); | ||
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| const elementRef = React.useRef<HTMLDivElement | null>(null); | ||
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| const order = React.useRef(0); | ||
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| // investigate alert implementation later | ||
| // const [alertList, setAlertList] = React.useState<string[]>([]); | ||
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| const batchMessages = React.useRef<{ batchId: string; message: AriaLiveMessage }[]>([]); | ||
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| const [messageQueue] = React.useState(() => | ||
| createPriorityQueue<AriaLiveMessage>((a, b) => { | ||
| if (a.priority !== b.priority) { | ||
| return b.priority - a.priority; | ||
| } | ||
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| return a.createdAt - b.createdAt; | ||
| }), | ||
| ); | ||
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| const queueMessage = React.useCallback(() => { | ||
| if (timeoutRef.current || !elementRef.current) { | ||
| return; | ||
| } | ||
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| const runCycle = () => { | ||
| if (!elementRef.current) { | ||
| return; | ||
| } | ||
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| if (targetDocument && messageQueue.peek()) { | ||
| // need a wrapping element for Narrator/Edge, which currently does not pick up text-only live region changes | ||
| // consistently | ||
| // if this is fixed, we can set textContent to the string directly | ||
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| const wrappingEl = targetDocument.createElement('span'); | ||
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| wrappingEl.innerText = messageQueue | ||
| .all() | ||
| .filter(msg => msg.message.trim().length > 0) | ||
| .reduce((prevText, currMsg) => prevText + currMsg.message + '. ', ''); | ||
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| elementRef.current.innerText = ''; | ||
| elementRef.current.appendChild(wrappingEl); | ||
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| messageQueue.clear(); | ||
| batchMessages.current = []; | ||
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| // begin new cycle to clear (or update) messages | ||
| timeoutRef.current = setAnnounceTimeout(() => { | ||
| runCycle(); | ||
| }, MESSAGE_DURATION); | ||
| } else { | ||
| elementRef.current.textContent = ''; | ||
| clearAnnounceTimeout(); | ||
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| timeoutRef.current = undefined; | ||
| } | ||
| }; | ||
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| runCycle(); | ||
| }, [clearAnnounceTimeout, messageQueue, setAnnounceTimeout, targetDocument]); | ||
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| const announce: AriaLiveAnnounceFn = React.useCallback( | ||
| (message: string, options: AnnounceOptions = {}) => { | ||
| const { alert = false, priority = 0, batchId } = options; | ||
|
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| // check if message is an alert | ||
| if (alert) { | ||
| // TODO: alert implementation | ||
| // setAlertList([...alertList, message]); | ||
| } | ||
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| const liveMessage: AriaLiveMessage = { | ||
| message, | ||
| createdAt: order.current++, | ||
| priority, | ||
| batchId, | ||
| }; | ||
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| // check if batchId exists | ||
| if (batchId) { | ||
| // update associated msg if it does | ||
| const batchMessage = batchMessages.current.find(msg => msg.batchId === batchId); | ||
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| if (batchMessage) { | ||
| // replace existing message in queue | ||
| messageQueue.remove(batchMessage.message); | ||
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| // update list of existing batchIds w/ most recent message | ||
| batchMessage.message = liveMessage; | ||
| } else { | ||
| // update list of existing batchIds, add new if doesn't already exist | ||
| batchMessages.current = [...batchMessages.current, { batchId, message: liveMessage }]; | ||
| } | ||
| } | ||
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| // add new message | ||
| messageQueue.enqueue(liveMessage); | ||
| queueMessage(); | ||
| }, | ||
| [messageQueue, queueMessage], | ||
| ); | ||
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| React.useEffect(() => { | ||
| if (!targetDocument) { | ||
| return; | ||
| } | ||
|
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| const element = targetDocument.createElement('div'); | ||
| element.setAttribute('aria-live', 'assertive'); | ||
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| Object.assign(element.style, VISUALLY_HIDDEN_STYLES); | ||
| targetDocument.body.append(element); | ||
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| elementRef.current = element; | ||
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| return () => { | ||
| element.remove(); | ||
| elementRef.current = null; | ||
| }; | ||
| }, [targetDocument]); | ||
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| return announce; | ||
| }; |