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* Copyright 2020 Adobe. All rights reserved.\n * This file is licensed to you under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License. You may obtain a copy\n * of the License at http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software distributed under\n * the License is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS\n * OF ANY KIND, either express or implied. See the License for the specific language\n * governing permissions and limitations under the License.\n */\n\nimport {DOMAttributes, FocusableElement, FocusStrategy, Key, KeyboardDelegate, RefObject} from '@react-types/shared';\nimport {flushSync} from 'react-dom';\nimport {FocusEvent, KeyboardEvent, useEffect, useRef} from 'react';\nimport {focusSafely, getFocusableTreeWalker} from '@react-aria/focus';\nimport {focusWithoutScrolling, mergeProps, scrollIntoView, scrollIntoViewport, useEvent, useRouter} from '@react-aria/utils';\nimport {getInteractionModality} from '@react-aria/interactions';\nimport {isCtrlKeyPressed, isNonContiguousSelectionModifier} from './utils';\nimport {MultipleSelectionManager} from '@react-stately/selection';\nimport {useLocale} from '@react-aria/i18n';\nimport {useTypeSelect} from './useTypeSelect';\n\nexport interface AriaSelectableCollectionOptions {\n /**\n * An interface for reading and updating multiple selection state.\n */\n selectionManager: MultipleSelectionManager,\n /**\n * A delegate object that implements behavior for keyboard focus movement.\n */\n keyboardDelegate: KeyboardDelegate,\n /**\n * The ref attached to the element representing the collection.\n */\n ref: RefObject<HTMLElement | null>,\n /**\n * Whether the collection or one of its items should be automatically focused upon render.\n * @default false\n */\n autoFocus?: boolean | FocusStrategy,\n /**\n * Whether focus should wrap around when the end/start is reached.\n * @default false\n */\n shouldFocusWrap?: boolean,\n /**\n * Whether the collection allows empty selection.\n * @default false\n */\n disallowEmptySelection?: boolean,\n /**\n * Whether the collection allows the user to select all items via keyboard shortcut.\n * @default false\n */\n disallowSelectAll?: boolean,\n /**\n * Whether selection should occur automatically on focus.\n * @default false\n */\n selectOnFocus?: boolean,\n /**\n * Whether typeahead is disabled.\n * @default false\n */\n disallowTypeAhead?: boolean,\n /**\n * Whether the collection items should use virtual focus instead of being focused directly.\n */\n shouldUseVirtualFocus?: boolean,\n /**\n * Whether navigation through tab key is enabled.\n */\n allowsTabNavigation?: boolean,\n /**\n * Whether the collection items are contained in a virtual scroller.\n */\n isVirtualized?: boolean,\n /**\n * The ref attached to the scrollable body. Used to provide automatic scrolling on item focus for non-virtualized collections.\n * If not provided, defaults to the collection ref.\n */\n scrollRef?: RefObject<HTMLElement | null>,\n /**\n * The behavior of links in the collection.\n * - 'action': link behaves like onAction.\n * - 'selection': link follows selection interactions (e.g. if URL drives selection).\n * - 'override': links override all other interactions (link items are not selectable).\n * @default 'action'\n */\n linkBehavior?: 'action' | 'selection' | 'override'\n}\n\nexport interface SelectableCollectionAria {\n /** Props for the collection element. */\n collectionProps: DOMAttributes\n}\n\n/**\n * Handles interactions with selectable collections.\n */\nexport function useSelectableCollection(options: AriaSelectableCollectionOptions): SelectableCollectionAria {\n let {\n selectionManager: manager,\n keyboardDelegate: delegate,\n ref,\n autoFocus = false,\n shouldFocusWrap = false,\n disallowEmptySelection = false,\n disallowSelectAll = false,\n selectOnFocus = manager.selectionBehavior === 'replace',\n disallowTypeAhead = false,\n shouldUseVirtualFocus,\n allowsTabNavigation = false,\n isVirtualized,\n // If no scrollRef is provided, assume the collection ref is the scrollable region\n scrollRef = ref,\n linkBehavior = 'action'\n } = options;\n let {direction} = useLocale();\n let router = useRouter();\n\n let onKeyDown = (e: KeyboardEvent) => {\n // Prevent option + tab from doing anything since it doesn't move focus to the cells, only buttons/checkboxes\n if (e.altKey && e.key === 'Tab') {\n e.preventDefault();\n }\n\n // Keyboard events bubble through portals. Don't handle keyboard events\n // for elements outside the collection (e.g. menus).\n if (!ref.current?.contains(e.target as Element)) {\n return;\n }\n\n const navigateToKey = (key: Key | undefined, childFocus?: FocusStrategy) => {\n if (key != null) {\n if (manager.isLink(key) && linkBehavior === 'selection' && selectOnFocus && !isNonContiguousSelectionModifier(e)) {\n // Set focused key and re-render synchronously to bring item into view if needed.\n flushSync(() => {\n manager.setFocusedKey(key, childFocus);\n });\n\n let item = scrollRef.current?.querySelector(`[data-key=\"${CSS.escape(key.toString())}\"]`);\n let itemProps = manager.getItemProps(key);\n if (item) {\n router.open(item, e, itemProps.href, itemProps.routerOptions);\n }\n\n return;\n }\n\n manager.setFocusedKey(key, childFocus);\n\n if (manager.isLink(key) && linkBehavior === 'override') {\n return;\n }\n\n if (e.shiftKey && manager.selectionMode === 'multiple') {\n manager.extendSelection(key);\n } else if (selectOnFocus && !isNonContiguousSelectionModifier(e)) {\n manager.replaceSelection(key);\n }\n }\n };\n\n switch (e.key) {\n case 'ArrowDown': {\n if (delegate.getKeyBelow) {\n let nextKey = manager.focusedKey != null\n ? delegate.getKeyBelow?.(manager.focusedKey)\n : delegate.getFirstKey?.();\n if (nextKey == null && shouldFocusWrap) {\n nextKey = delegate.getFirstKey?.(manager.focusedKey);\n }\n if (nextKey != null) {\n e.preventDefault();\n navigateToKey(nextKey);\n }\n }\n break;\n }\n case 'ArrowUp': {\n if (delegate.getKeyAbove) {\n let nextKey = manager.focusedKey != null\n ? delegate.getKeyAbove?.(manager.focusedKey)\n : delegate.getLastKey?.();\n if (nextKey == null && shouldFocusWrap) {\n nextKey = delegate.getLastKey?.(manager.focusedKey);\n }\n if (nextKey != null) {\n e.preventDefault();\n navigateToKey(nextKey);\n }\n }\n break;\n }\n case 'ArrowLeft': {\n if (delegate.getKeyLeftOf) {\n let nextKey: Key | undefined | null = manager.focusedKey != null ? delegate.getKeyLeftOf?.(manager.focusedKey) : null;\n if (nextKey == null && shouldFocusWrap) {\n nextKey = direction === 'rtl' ? delegate.getFirstKey?.(manager.focusedKey) : delegate.getLastKey?.(manager.focusedKey);\n }\n if (nextKey != null) {\n e.preventDefault();\n navigateToKey(nextKey, direction === 'rtl' ? 'first' : 'last');\n }\n }\n break;\n }\n case 'ArrowRight': {\n if (delegate.getKeyRightOf) {\n let nextKey: Key | undefined | null = manager.focusedKey != null ? delegate.getKeyRightOf?.(manager.focusedKey) : null;\n if (nextKey == null && shouldFocusWrap) {\n nextKey = direction === 'rtl' ? delegate.getLastKey?.(manager.focusedKey) : delegate.getFirstKey?.(manager.focusedKey);\n }\n if (nextKey != null) {\n e.preventDefault();\n navigateToKey(nextKey, direction === 'rtl' ? 'last' : 'first');\n }\n }\n break;\n }\n case 'Home':\n if (delegate.getFirstKey) {\n e.preventDefault();\n let firstKey: Key | null = delegate.getFirstKey(manager.focusedKey, isCtrlKeyPressed(e));\n manager.setFocusedKey(firstKey);\n if (firstKey != null) {\n if (isCtrlKeyPressed(e) && e.shiftKey && manager.selectionMode === 'multiple') {\n manager.extendSelection(firstKey);\n } else if (selectOnFocus) {\n manager.replaceSelection(firstKey);\n }\n }\n }\n break;\n case 'End':\n if (delegate.getLastKey) {\n e.preventDefault();\n let lastKey = delegate.getLastKey(manager.focusedKey, isCtrlKeyPressed(e));\n manager.setFocusedKey(lastKey);\n if (lastKey != null) {\n if (isCtrlKeyPressed(e) && e.shiftKey && manager.selectionMode === 'multiple') {\n manager.extendSelection(lastKey);\n } else if (selectOnFocus) {\n manager.replaceSelection(lastKey);\n }\n }\n }\n break;\n case 'PageDown':\n if (delegate.getKeyPageBelow && manager.focusedKey != null) {\n let nextKey = delegate.getKeyPageBelow(manager.focusedKey);\n if (nextKey != null) {\n e.preventDefault();\n navigateToKey(nextKey);\n }\n }\n break;\n case 'PageUp':\n if (delegate.getKeyPageAbove && manager.focusedKey != null) {\n let nextKey = delegate.getKeyPageAbove(manager.focusedKey);\n if (nextKey != null) {\n e.preventDefault();\n navigateToKey(nextKey);\n }\n }\n break;\n case 'a':\n if (isCtrlKeyPressed(e) && manager.selectionMode === 'multiple' && disallowSelectAll !== true) {\n e.preventDefault();\n manager.selectAll();\n }\n break;\n case 'Escape':\n if (!disallowEmptySelection && manager.selectedKeys.size !== 0) {\n e.stopPropagation();\n e.preventDefault();\n manager.clearSelection();\n }\n break;\n case 'Tab': {\n if (!allowsTabNavigation) {\n // There may be elements that are \"tabbable\" inside a collection (e.g. in a grid cell).\n // However, collections should be treated as a single tab stop, with arrow key navigation internally.\n // We don't control the rendering of these, so we can't override the tabIndex to prevent tabbing.\n // Instead, we handle the Tab key, and move focus manually to the first/last tabbable element\n // in the collection, so that the browser default behavior will apply starting from that element\n // rather than the currently focused one.\n if (e.shiftKey) {\n ref.current.focus();\n } else {\n let walker = getFocusableTreeWalker(ref.current, {tabbable: true});\n let next: FocusableElement | undefined = undefined;\n let last: FocusableElement;\n do {\n last = walker.lastChild() as FocusableElement;\n if (last) {\n next = last;\n }\n } while (last);\n\n if (next && !next.contains(document.activeElement)) {\n focusWithoutScrolling(next);\n }\n }\n break;\n }\n }\n }\n };\n\n // Store the scroll position so we can restore it later.\n /// TODO: should this happen all the time??\n let scrollPos = useRef({top: 0, left: 0});\n useEvent(scrollRef, 'scroll', isVirtualized ? undefined : () => {\n scrollPos.current = {\n top: scrollRef.current?.scrollTop ?? 0,\n left: scrollRef.current?.scrollLeft ?? 0\n };\n });\n\n let onFocus = (e: FocusEvent) => {\n if (manager.isFocused) {\n // If a focus event bubbled through a portal, reset focus state.\n if (!e.currentTarget.contains(e.target)) {\n manager.setFocused(false);\n }\n\n return;\n }\n\n // Focus events can bubble through portals. Ignore these events.\n if (!e.currentTarget.contains(e.target)) {\n return;\n }\n\n manager.setFocused(true);\n\n if (manager.focusedKey == null) {\n let navigateToFirstKey = (key: Key | undefined | null) => {\n if (key != null) {\n manager.setFocusedKey(key);\n if (selectOnFocus) {\n manager.replaceSelection(key);\n }\n }\n };\n // If the user hasn't yet interacted with the collection, there will be no focusedKey set.\n // Attempt to detect whether the user is tabbing forward or backward into the collection\n // and either focus the first or last item accordingly.\n let relatedTarget = e.relatedTarget as Element;\n if (relatedTarget && (e.currentTarget.compareDocumentPosition(relatedTarget) & Node.DOCUMENT_POSITION_FOLLOWING)) {\n navigateToFirstKey(manager.lastSelectedKey ?? delegate.getLastKey?.());\n } else {\n navigateToFirstKey(manager.firstSelectedKey ?? delegate.getFirstKey?.());\n }\n } else if (!isVirtualized && scrollRef.current) {\n // Restore the scroll position to what it was before.\n scrollRef.current.scrollTop = scrollPos.current.top;\n scrollRef.current.scrollLeft = scrollPos.current.left;\n }\n\n if (manager.focusedKey != null && scrollRef.current) {\n // Refocus and scroll the focused item into view if it exists within the scrollable region.\n let element = scrollRef.current.querySelector(`[data-key=\"${CSS.escape(manager.focusedKey.toString())}\"]`) as HTMLElement;\n if (element) {\n // This prevents a flash of focus on the first/last element in the collection, or the collection itself.\n if (!element.contains(document.activeElement)) {\n focusWithoutScrolling(element);\n }\n\n let modality = getInteractionModality();\n if (modality === 'keyboard') {\n scrollIntoViewport(element, {containingElement: ref.current});\n }\n }\n }\n };\n\n let onBlur = (e) => {\n // Don't set blurred and then focused again if moving focus within the collection.\n if (!e.currentTarget.contains(e.relatedTarget as HTMLElement)) {\n manager.setFocused(false);\n }\n };\n\n const autoFocusRef = useRef(autoFocus);\n useEffect(() => {\n if (autoFocusRef.current) {\n let focusedKey: Key | null = null;\n\n // Check focus strategy to determine which item to focus\n if (autoFocus === 'first') {\n focusedKey = delegate.getFirstKey?.() ?? null;\n } if (autoFocus === 'last') {\n focusedKey = delegate.getLastKey?.() ?? null;\n }\n\n // If there are any selected keys, make the first one the new focus target\n let selectedKeys = manager.selectedKeys;\n if (selectedKeys.size) {\n for (let key of selectedKeys) {\n if (manager.canSelectItem(key)) {\n focusedKey = key;\n break;\n }\n }\n }\n\n manager.setFocused(true);\n manager.setFocusedKey(focusedKey);\n\n // If no default focus key is selected, focus the collection itself.\n if (focusedKey == null && !shouldUseVirtualFocus && ref.current) {\n focusSafely(ref.current);\n }\n }\n // eslint-disable-next-line react-hooks/exhaustive-deps\n }, []);\n\n // Scroll the focused element into view when the focusedKey changes.\n let lastFocusedKey = useRef(manager.focusedKey);\n useEffect(() => {\n if (manager.isFocused && manager.focusedKey != null && (manager.focusedKey !== lastFocusedKey.current || autoFocusRef.current) && scrollRef.current && ref.current) {\n let modality = getInteractionModality();\n let element = ref.current.querySelector(`[data-key=\"${CSS.escape(manager.focusedKey.toString())}\"]`) as HTMLElement;\n if (!element) {\n // If item element wasn't found, return early (don't update autoFocusRef and lastFocusedKey).\n // The collection may initially be empty (e.g. virtualizer), so wait until the element exists.\n return;\n }\n\n if (modality === 'keyboard' || autoFocusRef.current) {\n scrollIntoView(scrollRef.current, element);\n\n // Avoid scroll in iOS VO, since it may cause overlay to close (i.e. RAC submenu)\n if (modality !== 'virtual') {\n scrollIntoViewport(element, {containingElement: ref.current});\n }\n }\n }\n\n // If the focused key becomes null (e.g. the last item is deleted), focus the whole collection.\n if (!shouldUseVirtualFocus && manager.isFocused && manager.focusedKey == null && lastFocusedKey.current != null && ref.current) {\n focusSafely(ref.current);\n }\n\n lastFocusedKey.current = manager.focusedKey;\n autoFocusRef.current = false;\n });\n\n // Intercept FocusScope restoration since virtualized collections can reuse DOM nodes.\n useEvent(ref, 'react-aria-focus-scope-restore', e => {\n e.preventDefault();\n manager.setFocused(true);\n });\n\n let handlers = {\n onKeyDown,\n onFocus,\n onBlur,\n onMouseDown(e) {\n // Ignore events that bubbled through portals.\n if (scrollRef.current === e.target) {\n // Prevent focus going to the collection when clicking on the scrollbar.\n e.preventDefault();\n }\n }\n };\n\n let {typeSelectProps} = useTypeSelect({\n keyboardDelegate: delegate,\n selectionManager: manager\n });\n\n if (!disallowTypeAhead) {\n handlers = mergeProps(typeSelectProps, handlers);\n }\n\n // If nothing is focused within the collection, make the collection itself tabbable.\n // This will be marshalled to either the first or last item depending on where focus came from.\n // If using virtual focus, don't set a tabIndex at all so that VoiceOver on iOS 14 doesn't try\n // to move real DOM focus to the element anyway.\n let tabIndex: number | undefined = undefined;\n if (!shouldUseVirtualFocus) {\n tabIndex = manager.focusedKey == null ? 0 : -1;\n }\n\n return {\n collectionProps: {\n ...handlers,\n tabIndex\n }\n };\n}\n"],"names":[],"version":3,"file":"useSelectableCollection.module.js.map"} |