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599 lines
22 KiB
Plaintext
599 lines
22 KiB
Plaintext
/*
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* Copyright 2020 Adobe. All rights reserved.
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* This file is licensed to you under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License. You may obtain a copy
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* of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under
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* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
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* OF ANY KIND, either express or implied. See the License for the specific language
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* governing permissions and limitations under the License.
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*/
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import {CLEAR_FOCUS_EVENT, FOCUS_EVENT, focusWithoutScrolling, getActiveElement, isCtrlKeyPressed, mergeProps, scrollIntoView, scrollIntoViewport, useEffectEvent, useEvent, useRouter, useUpdateLayoutEffect} from '@react-aria/utils';
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import {dispatchVirtualFocus, getFocusableTreeWalker, moveVirtualFocus} from '@react-aria/focus';
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import {DOMAttributes, FocusableElement, FocusStrategy, Key, KeyboardDelegate, RefObject} from '@react-types/shared';
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import {flushSync} from 'react-dom';
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import {FocusEvent, KeyboardEvent, useEffect, useRef} from 'react';
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import {focusSafely, getInteractionModality} from '@react-aria/interactions';
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import {getItemElement, isNonContiguousSelectionModifier, useCollectionId} from './utils';
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import {MultipleSelectionManager} from '@react-stately/selection';
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import {useLocale} from '@react-aria/i18n';
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import {useTypeSelect} from './useTypeSelect';
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export interface AriaSelectableCollectionOptions {
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/**
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* An interface for reading and updating multiple selection state.
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*/
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selectionManager: MultipleSelectionManager,
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/**
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* A delegate object that implements behavior for keyboard focus movement.
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*/
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keyboardDelegate: KeyboardDelegate,
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/**
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* The ref attached to the element representing the collection.
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*/
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ref: RefObject<HTMLElement | null>,
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/**
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* Whether the collection or one of its items should be automatically focused upon render.
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* @default false
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*/
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autoFocus?: boolean | FocusStrategy,
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/**
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* Whether focus should wrap around when the end/start is reached.
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* @default false
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*/
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shouldFocusWrap?: boolean,
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/**
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* Whether the collection allows empty selection.
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* @default false
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*/
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disallowEmptySelection?: boolean,
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/**
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* Whether the collection allows the user to select all items via keyboard shortcut.
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* @default false
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*/
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disallowSelectAll?: boolean,
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/**
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* Whether pressing the Escape should clear selection in the collection or not.
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* @default 'clearSelection'
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*/
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escapeKeyBehavior?: 'clearSelection' | 'none',
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/**
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* Whether selection should occur automatically on focus.
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* @default false
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*/
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selectOnFocus?: boolean,
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/**
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* Whether typeahead is disabled.
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* @default false
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*/
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disallowTypeAhead?: boolean,
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/**
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* Whether the collection items should use virtual focus instead of being focused directly.
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*/
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shouldUseVirtualFocus?: boolean,
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/**
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* Whether navigation through tab key is enabled.
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*/
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allowsTabNavigation?: boolean,
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/**
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* Whether the collection items are contained in a virtual scroller.
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*/
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isVirtualized?: boolean,
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/**
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* The ref attached to the scrollable body. Used to provide automatic scrolling on item focus for non-virtualized collections.
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* If not provided, defaults to the collection ref.
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*/
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scrollRef?: RefObject<HTMLElement | null>,
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/**
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* The behavior of links in the collection.
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* - 'action': link behaves like onAction.
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* - 'selection': link follows selection interactions (e.g. if URL drives selection).
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* - 'override': links override all other interactions (link items are not selectable).
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* @default 'action'
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*/
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linkBehavior?: 'action' | 'selection' | 'override'
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}
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export interface SelectableCollectionAria {
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/** Props for the collection element. */
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collectionProps: DOMAttributes
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}
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/**
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* Handles interactions with selectable collections.
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*/
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export function useSelectableCollection(options: AriaSelectableCollectionOptions): SelectableCollectionAria {
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let {
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selectionManager: manager,
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keyboardDelegate: delegate,
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ref,
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autoFocus = false,
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shouldFocusWrap = false,
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disallowEmptySelection = false,
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disallowSelectAll = false,
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escapeKeyBehavior = 'clearSelection',
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selectOnFocus = manager.selectionBehavior === 'replace',
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disallowTypeAhead = false,
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shouldUseVirtualFocus,
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allowsTabNavigation = false,
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isVirtualized,
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// If no scrollRef is provided, assume the collection ref is the scrollable region
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scrollRef = ref,
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linkBehavior = 'action'
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} = options;
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let {direction} = useLocale();
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let router = useRouter();
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let onKeyDown = (e: KeyboardEvent) => {
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// Prevent option + tab from doing anything since it doesn't move focus to the cells, only buttons/checkboxes
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if (e.altKey && e.key === 'Tab') {
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e.preventDefault();
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}
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// Keyboard events bubble through portals. Don't handle keyboard events
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// for elements outside the collection (e.g. menus).
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if (!ref.current?.contains(e.target as Element)) {
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return;
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}
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const navigateToKey = (key: Key | undefined, childFocus?: FocusStrategy) => {
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if (key != null) {
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if (manager.isLink(key) && linkBehavior === 'selection' && selectOnFocus && !isNonContiguousSelectionModifier(e)) {
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// Set focused key and re-render synchronously to bring item into view if needed.
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flushSync(() => {
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manager.setFocusedKey(key, childFocus);
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});
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let item = getItemElement(ref, key);
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let itemProps = manager.getItemProps(key);
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if (item) {
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router.open(item, e, itemProps.href, itemProps.routerOptions);
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}
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return;
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}
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manager.setFocusedKey(key, childFocus);
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if (manager.isLink(key) && linkBehavior === 'override') {
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return;
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}
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if (e.shiftKey && manager.selectionMode === 'multiple') {
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manager.extendSelection(key);
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} else if (selectOnFocus && !isNonContiguousSelectionModifier(e)) {
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manager.replaceSelection(key);
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}
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}
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};
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switch (e.key) {
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case 'ArrowDown': {
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if (delegate.getKeyBelow) {
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let nextKey = manager.focusedKey != null
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? delegate.getKeyBelow?.(manager.focusedKey)
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: delegate.getFirstKey?.();
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if (nextKey == null && shouldFocusWrap) {
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nextKey = delegate.getFirstKey?.(manager.focusedKey);
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}
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if (nextKey != null) {
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e.preventDefault();
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navigateToKey(nextKey);
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}
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}
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break;
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}
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case 'ArrowUp': {
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if (delegate.getKeyAbove) {
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let nextKey = manager.focusedKey != null
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? delegate.getKeyAbove?.(manager.focusedKey)
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: delegate.getLastKey?.();
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if (nextKey == null && shouldFocusWrap) {
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nextKey = delegate.getLastKey?.(manager.focusedKey);
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}
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if (nextKey != null) {
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e.preventDefault();
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navigateToKey(nextKey);
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}
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}
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break;
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}
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case 'ArrowLeft': {
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if (delegate.getKeyLeftOf) {
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let nextKey: Key | undefined | null = manager.focusedKey != null ? delegate.getKeyLeftOf?.(manager.focusedKey) : null;
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if (nextKey == null && shouldFocusWrap) {
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nextKey = direction === 'rtl' ? delegate.getFirstKey?.(manager.focusedKey) : delegate.getLastKey?.(manager.focusedKey);
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}
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if (nextKey != null) {
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e.preventDefault();
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navigateToKey(nextKey, direction === 'rtl' ? 'first' : 'last');
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}
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}
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break;
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}
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case 'ArrowRight': {
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if (delegate.getKeyRightOf) {
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let nextKey: Key | undefined | null = manager.focusedKey != null ? delegate.getKeyRightOf?.(manager.focusedKey) : null;
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if (nextKey == null && shouldFocusWrap) {
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nextKey = direction === 'rtl' ? delegate.getLastKey?.(manager.focusedKey) : delegate.getFirstKey?.(manager.focusedKey);
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}
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if (nextKey != null) {
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e.preventDefault();
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navigateToKey(nextKey, direction === 'rtl' ? 'last' : 'first');
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}
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}
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break;
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}
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case 'Home':
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if (delegate.getFirstKey) {
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if (manager.focusedKey === null && e.shiftKey) {
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return;
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}
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e.preventDefault();
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let firstKey: Key | null = delegate.getFirstKey(manager.focusedKey, isCtrlKeyPressed(e));
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manager.setFocusedKey(firstKey);
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if (firstKey != null) {
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if (isCtrlKeyPressed(e) && e.shiftKey && manager.selectionMode === 'multiple') {
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manager.extendSelection(firstKey);
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} else if (selectOnFocus) {
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manager.replaceSelection(firstKey);
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}
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}
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}
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break;
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case 'End':
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if (delegate.getLastKey) {
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if (manager.focusedKey === null && e.shiftKey) {
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return;
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}
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e.preventDefault();
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let lastKey = delegate.getLastKey(manager.focusedKey, isCtrlKeyPressed(e));
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manager.setFocusedKey(lastKey);
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if (lastKey != null) {
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if (isCtrlKeyPressed(e) && e.shiftKey && manager.selectionMode === 'multiple') {
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manager.extendSelection(lastKey);
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} else if (selectOnFocus) {
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manager.replaceSelection(lastKey);
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}
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}
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}
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break;
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case 'PageDown':
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if (delegate.getKeyPageBelow && manager.focusedKey != null) {
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let nextKey = delegate.getKeyPageBelow(manager.focusedKey);
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if (nextKey != null) {
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e.preventDefault();
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navigateToKey(nextKey);
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}
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}
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break;
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case 'PageUp':
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if (delegate.getKeyPageAbove && manager.focusedKey != null) {
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let nextKey = delegate.getKeyPageAbove(manager.focusedKey);
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if (nextKey != null) {
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e.preventDefault();
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navigateToKey(nextKey);
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}
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}
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break;
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case 'a':
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if (isCtrlKeyPressed(e) && manager.selectionMode === 'multiple' && disallowSelectAll !== true) {
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e.preventDefault();
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manager.selectAll();
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}
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break;
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case 'Escape':
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if (escapeKeyBehavior === 'clearSelection' && !disallowEmptySelection && manager.selectedKeys.size !== 0) {
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e.stopPropagation();
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e.preventDefault();
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manager.clearSelection();
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}
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break;
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case 'Tab': {
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if (!allowsTabNavigation) {
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// There may be elements that are "tabbable" inside a collection (e.g. in a grid cell).
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// However, collections should be treated as a single tab stop, with arrow key navigation internally.
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// We don't control the rendering of these, so we can't override the tabIndex to prevent tabbing.
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// Instead, we handle the Tab key, and move focus manually to the first/last tabbable element
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// in the collection, so that the browser default behavior will apply starting from that element
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// rather than the currently focused one.
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if (e.shiftKey) {
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ref.current.focus();
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} else {
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let walker = getFocusableTreeWalker(ref.current, {tabbable: true});
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let next: FocusableElement | undefined = undefined;
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let last: FocusableElement;
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do {
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last = walker.lastChild() as FocusableElement;
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if (last) {
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next = last;
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}
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} while (last);
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if (next && !next.contains(document.activeElement)) {
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focusWithoutScrolling(next);
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}
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}
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break;
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}
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}
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}
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};
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// Store the scroll position so we can restore it later.
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/// TODO: should this happen all the time??
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let scrollPos = useRef({top: 0, left: 0});
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useEvent(scrollRef, 'scroll', isVirtualized ? undefined : () => {
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scrollPos.current = {
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top: scrollRef.current?.scrollTop ?? 0,
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left: scrollRef.current?.scrollLeft ?? 0
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};
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});
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let onFocus = (e: FocusEvent) => {
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if (manager.isFocused) {
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// If a focus event bubbled through a portal, reset focus state.
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if (!e.currentTarget.contains(e.target)) {
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manager.setFocused(false);
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}
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return;
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}
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// Focus events can bubble through portals. Ignore these events.
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if (!e.currentTarget.contains(e.target)) {
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return;
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}
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manager.setFocused(true);
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if (manager.focusedKey == null) {
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let navigateToKey = (key: Key | undefined | null) => {
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if (key != null) {
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manager.setFocusedKey(key);
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if (selectOnFocus && !manager.isSelected(key)) {
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manager.replaceSelection(key);
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}
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}
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};
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// If the user hasn't yet interacted with the collection, there will be no focusedKey set.
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// Attempt to detect whether the user is tabbing forward or backward into the collection
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// and either focus the first or last item accordingly.
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let relatedTarget = e.relatedTarget as Element;
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if (relatedTarget && (e.currentTarget.compareDocumentPosition(relatedTarget) & Node.DOCUMENT_POSITION_FOLLOWING)) {
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navigateToKey(manager.lastSelectedKey ?? delegate.getLastKey?.());
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} else {
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navigateToKey(manager.firstSelectedKey ?? delegate.getFirstKey?.());
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}
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} else if (!isVirtualized && scrollRef.current) {
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// Restore the scroll position to what it was before.
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scrollRef.current.scrollTop = scrollPos.current.top;
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scrollRef.current.scrollLeft = scrollPos.current.left;
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}
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if (manager.focusedKey != null && scrollRef.current) {
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// Refocus and scroll the focused item into view if it exists within the scrollable region.
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let element = getItemElement(ref, manager.focusedKey);
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if (element instanceof HTMLElement) {
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// This prevents a flash of focus on the first/last element in the collection, or the collection itself.
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if (!element.contains(document.activeElement) && !shouldUseVirtualFocus) {
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focusWithoutScrolling(element);
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}
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let modality = getInteractionModality();
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if (modality === 'keyboard') {
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scrollIntoViewport(element, {containingElement: ref.current});
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}
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}
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}
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};
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let onBlur = (e) => {
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// Don't set blurred and then focused again if moving focus within the collection.
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if (!e.currentTarget.contains(e.relatedTarget as HTMLElement)) {
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manager.setFocused(false);
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}
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};
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// Ref to track whether the first item in the collection should be automatically focused. Specifically used for autocomplete when user types
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// to focus the first key AFTER the collection updates.
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// TODO: potentially expand the usage of this
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let shouldVirtualFocusFirst = useRef(false);
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// Add event listeners for custom virtual events. These handle updating the focused key in response to various keyboard events
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// at the autocomplete level
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// TODO: fix type later
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useEvent(ref, FOCUS_EVENT, !shouldUseVirtualFocus ? undefined : (e: any) => {
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let {detail} = e;
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e.stopPropagation();
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manager.setFocused(true);
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// If the user is typing forwards, autofocus the first option in the list.
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if (detail?.focusStrategy === 'first') {
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shouldVirtualFocusFirst.current = true;
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}
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});
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let updateActiveDescendant = useEffectEvent(() => {
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let keyToFocus = delegate.getFirstKey?.() ?? null;
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// If no focusable items exist in the list, make sure to clear any activedescendant that may still exist and move focus back to
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// the original active element (e.g. the autocomplete input)
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if (keyToFocus == null) {
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let previousActiveElement = getActiveElement();
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moveVirtualFocus(ref.current);
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dispatchVirtualFocus(previousActiveElement!, null);
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// If there wasn't a focusable key but the collection had items, then that means we aren't in an intermediate load state and all keys are disabled.
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// Reset shouldVirtualFocusFirst so that we don't erronously autofocus an item when the collection is filtered again.
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if (manager.collection.size > 0) {
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shouldVirtualFocusFirst.current = false;
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}
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} else {
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manager.setFocusedKey(keyToFocus);
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// Only set shouldVirtualFocusFirst to false if we've successfully set the first key as the focused key
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// If there wasn't a key to focus, we might be in a temporary loading state so we'll want to still focus the first key
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// after the collection updates after load
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shouldVirtualFocusFirst.current = false;
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}
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});
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useUpdateLayoutEffect(() => {
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if (shouldVirtualFocusFirst.current) {
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updateActiveDescendant();
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}
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}, [manager.collection, updateActiveDescendant]);
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let resetFocusFirstFlag = useEffectEvent(() => {
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// If user causes the focused key to change in any other way, clear shouldVirtualFocusFirst so we don't
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// accidentally move focus from under them. Skip this if the collection was empty because we might be in a load
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// state and will still want to focus the first item after load
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if (manager.collection.size > 0) {
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shouldVirtualFocusFirst.current = false;
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}
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});
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useUpdateLayoutEffect(() => {
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resetFocusFirstFlag();
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}, [manager.focusedKey, resetFocusFirstFlag]);
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useEvent(ref, CLEAR_FOCUS_EVENT, !shouldUseVirtualFocus ? undefined : (e: any) => {
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e.stopPropagation();
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manager.setFocused(false);
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if (e.detail?.clearFocusKey) {
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manager.setFocusedKey(null);
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}
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});
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const autoFocusRef = useRef(autoFocus);
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const didAutoFocusRef = useRef(false);
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useEffect(() => {
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if (autoFocusRef.current) {
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let focusedKey: Key | null = null;
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// Check focus strategy to determine which item to focus
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if (autoFocus === 'first') {
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focusedKey = delegate.getFirstKey?.() ?? null;
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} if (autoFocus === 'last') {
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focusedKey = delegate.getLastKey?.() ?? null;
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}
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// If there are any selected keys, make the first one the new focus target
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let selectedKeys = manager.selectedKeys;
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if (selectedKeys.size) {
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for (let key of selectedKeys) {
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if (manager.canSelectItem(key)) {
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focusedKey = key;
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break;
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}
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}
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}
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manager.setFocused(true);
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manager.setFocusedKey(focusedKey);
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// If no default focus key is selected, focus the collection itself.
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if (focusedKey == null && !shouldUseVirtualFocus && ref.current) {
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focusSafely(ref.current);
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}
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// Wait until the collection has items to autofocus.
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if (manager.collection.size > 0) {
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autoFocusRef.current = false;
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didAutoFocusRef.current = true;
|
|
}
|
|
}
|
|
});
|
|
|
|
// Scroll the focused element into view when the focusedKey changes.
|
|
let lastFocusedKey = useRef(manager.focusedKey);
|
|
let raf = useRef<number | null>(null);
|
|
useEffect(() => {
|
|
if (manager.isFocused && manager.focusedKey != null && (manager.focusedKey !== lastFocusedKey.current || didAutoFocusRef.current) && scrollRef.current && ref.current) {
|
|
let modality = getInteractionModality();
|
|
let element = getItemElement(ref, manager.focusedKey);
|
|
if (!(element instanceof HTMLElement)) {
|
|
// If item element wasn't found, return early (don't update autoFocusRef and lastFocusedKey).
|
|
// The collection may initially be empty (e.g. virtualizer), so wait until the element exists.
|
|
return;
|
|
}
|
|
|
|
if (modality === 'keyboard' || didAutoFocusRef.current) {
|
|
|
|
if (raf.current) {
|
|
cancelAnimationFrame(raf.current);
|
|
}
|
|
|
|
raf.current = requestAnimationFrame(() => {
|
|
if (scrollRef.current) {
|
|
scrollIntoView(scrollRef.current, element);
|
|
// Avoid scroll in iOS VO, since it may cause overlay to close (i.e. RAC submenu)
|
|
if (modality !== 'virtual') {
|
|
scrollIntoViewport(element, {containingElement: ref.current});
|
|
}
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
// If the focused key becomes null (e.g. the last item is deleted), focus the whole collection.
|
|
if (!shouldUseVirtualFocus && manager.isFocused && manager.focusedKey == null && lastFocusedKey.current != null && ref.current) {
|
|
focusSafely(ref.current);
|
|
}
|
|
|
|
lastFocusedKey.current = manager.focusedKey;
|
|
didAutoFocusRef.current = false;
|
|
});
|
|
|
|
useEffect(() => {
|
|
return () => {
|
|
if (raf.current) {
|
|
cancelAnimationFrame(raf.current);
|
|
}
|
|
};
|
|
}, []);
|
|
|
|
// Intercept FocusScope restoration since virtualized collections can reuse DOM nodes.
|
|
useEvent(ref, 'react-aria-focus-scope-restore', e => {
|
|
e.preventDefault();
|
|
manager.setFocused(true);
|
|
});
|
|
|
|
let handlers = {
|
|
onKeyDown,
|
|
onFocus,
|
|
onBlur,
|
|
onMouseDown(e) {
|
|
// Ignore events that bubbled through portals.
|
|
if (scrollRef.current === e.target) {
|
|
// Prevent focus going to the collection when clicking on the scrollbar.
|
|
e.preventDefault();
|
|
}
|
|
}
|
|
};
|
|
|
|
let {typeSelectProps} = useTypeSelect({
|
|
keyboardDelegate: delegate,
|
|
selectionManager: manager
|
|
});
|
|
|
|
if (!disallowTypeAhead) {
|
|
handlers = mergeProps(typeSelectProps, handlers);
|
|
}
|
|
|
|
// If nothing is focused within the collection, make the collection itself tabbable.
|
|
// This will be marshalled to either the first or last item depending on where focus came from.
|
|
let tabIndex: number | undefined = undefined;
|
|
if (!shouldUseVirtualFocus) {
|
|
tabIndex = manager.focusedKey == null ? 0 : -1;
|
|
}
|
|
|
|
let collectionId = useCollectionId(manager.collection);
|
|
return {
|
|
collectionProps: mergeProps(handlers, {
|
|
tabIndex,
|
|
'data-collection': collectionId
|
|
})
|
|
};
|
|
}
|