react-aria/dist/private/gridlist/useGridListItem.mjs.map

Spectrum UI components in React

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* Copyright 2022 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 {chain} from '../utils/chain';\n\nimport {\n  Collection,\n  DOMAttributes,\n  FocusableElement,\n  Key,\n  RefObject,\n  Node as RSNode\n} from '@react-types/shared';\nimport {focusSafely} from '../interactions/focusSafely';\nimport {\n  getActiveElement,\n  getEventTarget,\n  isFocusWithin,\n  nodeContains\n} from '../utils/shadowdom/DOMFunctions';\nimport {getFocusableTreeWalker} from '../focus/FocusScope';\nimport {getRowId, listMap} from './utils';\nimport {getScrollParent} from '../utils/getScrollParent';\nimport {HTMLAttributes, KeyboardEvent as ReactKeyboardEvent, useRef} from 'react';\nimport {isFocusVisible} from '../interactions/useFocusVisible';\nimport type {ListState} from 'react-stately/useListState';\nimport {mergeProps} from '../utils/mergeProps';\nimport {scrollIntoViewport} from '../utils/scrollIntoView';\nimport {SelectableItemStates, useSelectableItem} from '../selection/useSelectableItem';\nimport type {TreeState} from 'react-stately/useTreeState';\nimport {useLocale} from '../i18n/I18nProvider';\nimport {useSlotId} from '../utils/useId';\nimport {useSyntheticLinkProps} from '../utils/openLink';\n\nexport interface AriaGridListItemOptions {\n  /**\n   * An object representing the list item. Contains all the relevant information that makes up the\n   * list row.\n   */\n  node: RSNode<unknown>;\n  /** Whether the list row is contained in a virtual scroller. */\n  isVirtualized?: boolean;\n  /** Whether selection should occur on press up instead of press down. */\n  shouldSelectOnPressUp?: boolean;\n  /** Whether this item has children, even if not loaded yet. */\n  hasChildItems?: boolean;\n}\n\nexport interface GridListItemAria extends SelectableItemStates {\n  /** Props for the list row element. */\n  rowProps: DOMAttributes;\n  /** Props for the grid cell element within the list row. */\n  gridCellProps: DOMAttributes;\n  /** Props for the list item description element, if any. */\n  descriptionProps: DOMAttributes;\n}\n\nconst EXPANSION_KEYS = {\n  expand: {\n    ltr: 'ArrowRight',\n    rtl: 'ArrowLeft'\n  },\n  collapse: {\n    ltr: 'ArrowLeft',\n    rtl: 'ArrowRight'\n  }\n};\n\n/**\n * Provides the behavior and accessibility implementation for a row in a grid list.\n *\n * @param props - Props for the row.\n * @param state - State of the parent list, as returned by `useListState`.\n * @param ref - The ref attached to the row element.\n */\nexport function useGridListItem<T>(\n  props: AriaGridListItemOptions,\n  state: ListState<T> | TreeState<T>,\n  ref: RefObject<FocusableElement | null>\n): GridListItemAria {\n  // Copied from useGridCell + some modifications to make it not so grid specific\n  let {node, isVirtualized} = props;\n\n  // let stringFormatter = useLocalizedStringFormatter(intlMessages, '@react-aria/gridlist');\n  let {direction} = useLocale();\n  let {onAction, linkBehavior, keyboardNavigationBehavior, shouldSelectOnPressUp} =\n    listMap.get(state)!;\n  let descriptionId = useSlotId();\n\n  // We need to track the key of the item at the time it was last focused so that we force\n  // focus to go to the item when the DOM node is reused for a different item in a virtualizer.\n  let keyWhenFocused = useRef<Key | null>(null);\n  let focus = () => {\n    // Don't shift focus to the row if the active element is a element within the row already\n    // (e.g. clicking on a row button)\n    if (\n      ref.current !== null &&\n      ((keyWhenFocused.current != null && node.key !== keyWhenFocused.current) ||\n        !isFocusWithin(ref.current))\n    ) {\n      focusSafely(ref.current);\n    }\n  };\n\n  let treeGridRowProps: HTMLAttributes<HTMLElement> = {};\n  let hasChildRows = props.hasChildItems;\n  let hasLink = state.selectionManager.isLink(node.key);\n  if (node != null && 'expandedKeys' in state) {\n    // TODO: ideally node.hasChildNodes would be a way to tell if a row has child nodes, but the row's contents make it so that value is always\n    // true...\n    let children = state.collection.getChildren?.(node.key);\n    hasChildRows = hasChildRows || [...(children ?? [])].length > 1;\n\n    if (\n      onAction == null &&\n      !hasLink &&\n      state.selectionManager.selectionMode === 'none' &&\n      hasChildRows\n    ) {\n      onAction = () => state.toggleKey(node.key);\n    }\n\n    let isExpanded = hasChildRows ? state.expandedKeys.has(node.key) : undefined;\n    let setSize = 1;\n    let index = node.index;\n    if (node.level >= 0 && node?.parentKey != null) {\n      let parent = state.collection.getItem(node.parentKey);\n      if (parent) {\n        // siblings must exist because our original node exists\n        let siblings = getDirectChildren(parent, state.collection);\n        setSize = [...siblings].filter(row => row.type === 'item').length;\n        if (index > 0 && siblings[0].type !== 'item') {\n          index -= 1; // subtract one for the parent item's content node\n        }\n      }\n    } else {\n      setSize = [...state.collection].filter(row => row.level === 0 && row.type === 'item').length;\n    }\n\n    treeGridRowProps = {\n      'aria-expanded': isExpanded,\n      'aria-level': node.level + 1,\n      'aria-posinset': index + 1,\n      'aria-setsize': setSize\n    };\n  }\n\n  let {itemProps, ...itemStates} = useSelectableItem({\n    selectionManager: state.selectionManager,\n    key: node.key,\n    ref,\n    isVirtualized,\n    shouldSelectOnPressUp: props.shouldSelectOnPressUp || shouldSelectOnPressUp,\n    onAction:\n      onAction || node.props?.onAction\n        ? chain(node.props?.onAction, onAction ? () => onAction(node.key) : undefined)\n        : undefined,\n    focus,\n    linkBehavior\n  });\n\n  let onKeyDownCapture = (e: ReactKeyboardEvent) => {\n    let activeElement = getActiveElement();\n    if (\n      !nodeContains(e.currentTarget, getEventTarget(e) as Element) ||\n      !ref.current ||\n      !activeElement\n    ) {\n      return;\n    }\n\n    let walker = getFocusableTreeWalker(ref.current);\n    walker.currentNode = activeElement;\n\n    if ('expandedKeys' in state && activeElement === ref.current) {\n      if (\n        e.key === EXPANSION_KEYS['expand'][direction] &&\n        state.selectionManager.focusedKey === node.key &&\n        hasChildRows &&\n        !state.expandedKeys.has(node.key)\n      ) {\n        state.toggleKey(node.key);\n        e.stopPropagation();\n        return;\n      } else if (\n        e.key === EXPANSION_KEYS['collapse'][direction] &&\n        state.selectionManager.focusedKey === node.key\n      ) {\n        // If item is collapsible, collapse it; else move to parent\n        if (hasChildRows && state.expandedKeys.has(node.key)) {\n          state.toggleKey(node.key);\n          e.stopPropagation();\n          return;\n        } else if (\n          !state.expandedKeys.has(node.key) &&\n          node.parentKey &&\n          state.collection.getItem(node.parentKey)?.type === 'item'\n        ) {\n          // Item is a leaf or already collapsed, move focus to parent\n          state.selectionManager.setFocusedKey(node.parentKey);\n          e.stopPropagation();\n          return;\n        }\n      }\n    }\n\n    switch (e.key) {\n      case 'ArrowLeft': {\n        if (keyboardNavigationBehavior === 'arrow') {\n          // Find the next focusable element within the row.\n          let focusable =\n            direction === 'rtl'\n              ? (walker.nextNode() as FocusableElement)\n              : (walker.previousNode() as FocusableElement);\n\n          if (focusable) {\n            e.preventDefault();\n            e.stopPropagation();\n            focusSafely(focusable);\n            scrollIntoViewport(focusable, {containingElement: getScrollParent(ref.current)});\n          } else {\n            // If there is no next focusable child, then return focus back to the row\n            e.preventDefault();\n            e.stopPropagation();\n            if (direction === 'rtl') {\n              focusSafely(ref.current);\n              scrollIntoViewport(ref.current, {containingElement: getScrollParent(ref.current)});\n            } else {\n              walker.currentNode = ref.current;\n              let lastElement = last(walker);\n              // oxlint-disable-next-line max-depth\n              if (lastElement) {\n                focusSafely(lastElement);\n                scrollIntoViewport(lastElement, {containingElement: getScrollParent(ref.current)});\n              }\n            }\n          }\n        }\n        break;\n      }\n      case 'ArrowRight': {\n        if (keyboardNavigationBehavior === 'arrow') {\n          let focusable =\n            direction === 'rtl'\n              ? (walker.previousNode() as FocusableElement)\n              : (walker.nextNode() as FocusableElement);\n\n          if (focusable) {\n            e.preventDefault();\n            e.stopPropagation();\n            focusSafely(focusable);\n            scrollIntoViewport(focusable, {containingElement: getScrollParent(ref.current)});\n          } else {\n            e.preventDefault();\n            e.stopPropagation();\n            if (direction === 'ltr') {\n              focusSafely(ref.current);\n              scrollIntoViewport(ref.current, {containingElement: getScrollParent(ref.current)});\n            } else {\n              walker.currentNode = ref.current;\n              let lastElement = last(walker);\n              // oxlint-disable-next-line max-depth\n              if (lastElement) {\n                focusSafely(lastElement);\n                scrollIntoViewport(lastElement, {containingElement: getScrollParent(ref.current)});\n              }\n            }\n          }\n        }\n        break;\n      }\n      case 'ArrowUp':\n      case 'ArrowDown':\n        // Prevent this event from reaching row children, e.g. menu buttons. We want arrow keys to navigate\n        // to the row above/below instead. We need to re-dispatch the event from a higher parent so it still\n        // bubbles and gets handled by useSelectableCollection.\n        if (!e.altKey && nodeContains(ref.current, getEventTarget(e) as Element)) {\n          e.stopPropagation();\n          e.preventDefault();\n          ref.current.parentElement?.dispatchEvent(\n            new KeyboardEvent(e.nativeEvent.type, e.nativeEvent)\n          );\n        }\n        break;\n    }\n  };\n\n  let onFocus = e => {\n    keyWhenFocused.current = node.key;\n    if (getEventTarget(e) !== ref.current) {\n      // useSelectableItem only handles setting the focused key when\n      // the focused element is the row itself. We also want to\n      // set the focused key when a child element receives focus.\n      // If focus is currently visible (e.g. the user is navigating with the keyboard),\n      // then skip this. We want to restore focus to the previously focused row\n      // in that case since the list should act like a single tab stop.\n      if (!isFocusVisible()) {\n        state.selectionManager.setFocusedKey(node.key);\n      }\n      return;\n    }\n  };\n\n  let onKeyDown = e => {\n    let activeElement = getActiveElement();\n    if (\n      !nodeContains(e.currentTarget, getEventTarget(e) as Element) ||\n      !ref.current ||\n      !activeElement\n    ) {\n      return;\n    }\n\n    switch (e.key) {\n      case 'Tab': {\n        if (keyboardNavigationBehavior === 'tab') {\n          // If there is another focusable element within this item, stop propagation so the tab key\n          // is handled by the browser and not by useSelectableCollection (which would take us out of the list).\n          let walker = getFocusableTreeWalker(ref.current, {tabbable: true});\n          walker.currentNode = activeElement;\n          let next = e.shiftKey ? walker.previousNode() : walker.nextNode();\n\n          if (next) {\n            e.stopPropagation();\n          }\n        }\n      }\n    }\n  };\n\n  let syntheticLinkProps = useSyntheticLinkProps(node.props);\n  let linkProps = itemStates.hasAction ? syntheticLinkProps : {};\n  // TODO: re-add when we get translations and fix this for iOS VO\n  // let rowAnnouncement;\n  // if (onAction) {\n  //   rowAnnouncement = stringFormatter.format('hasActionAnnouncement');\n  // } else if (hasLink) {\n  //   rowAnnouncement = stringFormatter.format('hasLinkAnnouncement', {\n  //     link: node.props.href\n  //   });\n  // }\n\n  let rowProps: DOMAttributes = mergeProps(itemProps, linkProps, {\n    role: 'row',\n    onKeyDownCapture,\n    onKeyDown,\n    onFocus,\n    // 'aria-label': [(node.textValue || undefined), rowAnnouncement].filter(Boolean).join(', '),\n    'aria-label': node['aria-label'] || node.textValue || undefined,\n    'aria-selected': state.selectionManager.canSelectItem(node.key)\n      ? state.selectionManager.isSelected(node.key)\n      : undefined,\n    'aria-disabled': state.selectionManager.isDisabled(node.key) || undefined,\n    'aria-labelledby':\n      descriptionId && (node['aria-label'] || node.textValue)\n        ? `${getRowId(state, node.key)} ${descriptionId}`\n        : undefined,\n    id: getRowId(state, node.key)\n  });\n\n  if (isVirtualized) {\n    let {collection} = state;\n    let nodes = [...collection];\n    // TODO: refactor ListCollection to store an absolute index of a node's position?\n    rowProps['aria-rowindex'] = nodes.find(node => node.type === 'section')\n      ? [...collection.getKeys()]\n          .filter(key => collection.getItem(key)?.type !== 'section')\n          .findIndex(key => key === node.key) + 1\n      : node.index + 1;\n  }\n\n  let gridCellProps = {\n    role: 'gridcell',\n    'aria-colindex': 1\n  };\n\n  // TODO: should isExpanded and hasChildRows be a item state that gets returned by the hook?\n  return {\n    rowProps: {...mergeProps(rowProps, treeGridRowProps)},\n    gridCellProps,\n    descriptionProps: {\n      id: descriptionId\n    },\n    ...itemStates\n  };\n}\n\nfunction last(walker: TreeWalker) {\n  let next: FocusableElement | null = null;\n  let last: FocusableElement | null = null;\n  do {\n    last = walker.lastChild() as FocusableElement | null;\n    if (last) {\n      next = last;\n    }\n  } while (last);\n  return next;\n}\n\nfunction getDirectChildren<T>(parent: RSNode<T>, collection: Collection<RSNode<T>>) {\n  // We can't assume that we can use firstChildKey because if a person builds a tree using hooks, they would not have access to that property (using type Node vs CollectionNode)\n  // Instead, get all children and start at the first node (rather than just using firstChildKey) and only look at its siblings\n  let children = collection.getChildren?.(parent.key);\n  let childArray = children ? Array.from(children) : [];\n  let node = childArray.length > 0 ? childArray[0] : null;\n  let siblings: RSNode<T>[] = [];\n  while (node) {\n    siblings.push(node);\n    node = node.nextKey != null ? collection.getItem(node.nextKey) : null;\n  }\n  return siblings;\n}\n"],"names":[],"version":3,"file":"useGridListItem.mjs.map"}