element-plus/es/components/focus-trap/src/utils.mjs.map

A Component Library for Vue 3

{"version":3,"file":"utils.mjs","sources":["../../../../../../packages/components/focus-trap/src/utils.ts"],"sourcesContent":["export type FocusLayer = {\n  paused: boolean\n  pause: () => void\n  resume: () => void\n}\n\nexport type FocusStack = FocusLayer[]\n\nexport const obtainAllFocusableElements = (\n  element: HTMLElement\n): HTMLElement[] => {\n  const nodes: HTMLElement[] = []\n  const walker = document.createTreeWalker(element, NodeFilter.SHOW_ELEMENT, {\n    acceptNode: (\n      node: Element & {\n        disabled: boolean\n        hidden: boolean\n        type: string\n        tabIndex: number\n      }\n    ) => {\n      const isHiddenInput = node.tagName === 'INPUT' && node.type === 'hidden'\n      if (node.disabled || node.hidden || isHiddenInput)\n        return NodeFilter.FILTER_SKIP\n      return node.tabIndex >= 0\n        ? NodeFilter.FILTER_ACCEPT\n        : NodeFilter.FILTER_SKIP\n    },\n  })\n  while (walker.nextNode()) nodes.push(walker.currentNode as HTMLElement)\n\n  return nodes\n}\n\nexport const getVisibleElement = (\n  elements: HTMLElement[],\n  container: HTMLElement\n) => {\n  for (const element of elements) {\n    if (!isHidden(element, container)) return element\n  }\n}\n\nexport const isHidden = (element: HTMLElement, container: HTMLElement) => {\n  if (process.env.NODE_ENV === 'test') return false\n  if (getComputedStyle(element).visibility === 'hidden') return true\n\n  while (element) {\n    if (container && element === container) return false\n    if (getComputedStyle(element).display === 'none') return true\n    element = element.parentElement as HTMLElement\n  }\n\n  return false\n}\n\nexport const getEdges = (container: HTMLElement) => {\n  const focusable = obtainAllFocusableElements(container)\n  const first = getVisibleElement(focusable, container)\n  const last = getVisibleElement(focusable.reverse(), container)\n  return [first, last]\n}\n\nconst isSelectable = (\n  element: any\n): element is HTMLInputElement & { select: () => void } => {\n  return element instanceof HTMLInputElement && 'select' in element\n}\n\nexport const tryFocus = (\n  element?: HTMLElement | { focus: () => void } | null,\n  shouldSelect?: boolean\n) => {\n  if (element && element.focus) {\n    const prevFocusedElement = document.activeElement\n    element.focus({ preventScroll: true })\n    if (\n      element !== prevFocusedElement &&\n      isSelectable(element) &&\n      shouldSelect\n    ) {\n      element.select()\n    }\n  }\n}\n\nfunction removeFromStack<T>(list: T[], item: T) {\n  const copy = [...list]\n\n  const idx = list.indexOf(item)\n\n  if (idx !== -1) {\n    copy.splice(idx, 1)\n  }\n  return copy\n}\n\nconst createFocusableStack = () => {\n  let stack = [] as FocusStack\n\n  const push = (layer: FocusLayer) => {\n    const currentLayer = stack[0]\n\n    if (currentLayer && layer !== currentLayer) {\n      currentLayer.pause()\n    }\n\n    stack = removeFromStack(stack, layer)\n    stack.unshift(layer)\n  }\n\n  const remove = (layer: FocusLayer) => {\n    stack = removeFromStack(stack, layer)\n    stack[0]?.resume?.()\n  }\n\n  return {\n    push,\n    remove,\n  }\n}\n\nexport const focusFirstDescendant = (\n  elements: HTMLElement[],\n  shouldSelect = false\n) => {\n  const prevFocusedElement = document.activeElement\n  for (const element of elements) {\n    tryFocus(element, shouldSelect)\n    if (document.activeElement !== prevFocusedElement) return\n  }\n}\n\nexport const focusableStack = 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