162 lines
		
	
	
		
			6.1 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			162 lines
		
	
	
		
			6.1 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
function hasWindow() {
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  return typeof window !== 'undefined';
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}
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function getNodeName(node) {
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  if (isNode(node)) {
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    return (node.nodeName || '').toLowerCase();
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  }
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  // Mocked nodes in testing environments may not be instances of Node. By
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  // returning `#document` an infinite loop won't occur.
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  // https://github.com/floating-ui/floating-ui/issues/2317
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  return '#document';
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}
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function getWindow(node) {
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  var _node$ownerDocument;
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  return (node == null || (_node$ownerDocument = node.ownerDocument) == null ? void 0 : _node$ownerDocument.defaultView) || window;
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}
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function getDocumentElement(node) {
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  var _ref;
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  return (_ref = (isNode(node) ? node.ownerDocument : node.document) || window.document) == null ? void 0 : _ref.documentElement;
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}
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function isNode(value) {
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  if (!hasWindow()) {
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    return false;
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  }
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  return value instanceof Node || value instanceof getWindow(value).Node;
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}
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function isElement(value) {
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  if (!hasWindow()) {
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    return false;
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  }
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  return value instanceof Element || value instanceof getWindow(value).Element;
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}
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function isHTMLElement(value) {
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  if (!hasWindow()) {
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    return false;
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  }
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  return value instanceof HTMLElement || value instanceof getWindow(value).HTMLElement;
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}
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function isShadowRoot(value) {
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  if (!hasWindow() || typeof ShadowRoot === 'undefined') {
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    return false;
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  }
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  return value instanceof ShadowRoot || value instanceof getWindow(value).ShadowRoot;
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}
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const invalidOverflowDisplayValues = /*#__PURE__*/new Set(['inline', 'contents']);
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function isOverflowElement(element) {
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  const {
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    overflow,
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    overflowX,
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    overflowY,
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    display
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  } = getComputedStyle(element);
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  return /auto|scroll|overlay|hidden|clip/.test(overflow + overflowY + overflowX) && !invalidOverflowDisplayValues.has(display);
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}
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const tableElements = /*#__PURE__*/new Set(['table', 'td', 'th']);
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function isTableElement(element) {
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  return tableElements.has(getNodeName(element));
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}
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const topLayerSelectors = [':popover-open', ':modal'];
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function isTopLayer(element) {
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  return topLayerSelectors.some(selector => {
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    try {
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      return element.matches(selector);
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    } catch (_e) {
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      return false;
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    }
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  });
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}
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const transformProperties = ['transform', 'translate', 'scale', 'rotate', 'perspective'];
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const willChangeValues = ['transform', 'translate', 'scale', 'rotate', 'perspective', 'filter'];
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const containValues = ['paint', 'layout', 'strict', 'content'];
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function isContainingBlock(elementOrCss) {
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  const webkit = isWebKit();
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  const css = isElement(elementOrCss) ? getComputedStyle(elementOrCss) : elementOrCss;
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  // https://developer.mozilla.org/en-US/docs/Web/CSS/Containing_block#identifying_the_containing_block
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  // https://drafts.csswg.org/css-transforms-2/#individual-transforms
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  return transformProperties.some(value => css[value] ? css[value] !== 'none' : false) || (css.containerType ? css.containerType !== 'normal' : false) || !webkit && (css.backdropFilter ? css.backdropFilter !== 'none' : false) || !webkit && (css.filter ? css.filter !== 'none' : false) || willChangeValues.some(value => (css.willChange || '').includes(value)) || containValues.some(value => (css.contain || '').includes(value));
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}
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function getContainingBlock(element) {
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  let currentNode = getParentNode(element);
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  while (isHTMLElement(currentNode) && !isLastTraversableNode(currentNode)) {
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    if (isContainingBlock(currentNode)) {
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      return currentNode;
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    } else if (isTopLayer(currentNode)) {
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      return null;
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    }
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    currentNode = getParentNode(currentNode);
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  }
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  return null;
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}
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function isWebKit() {
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  if (typeof CSS === 'undefined' || !CSS.supports) return false;
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  return CSS.supports('-webkit-backdrop-filter', 'none');
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}
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const lastTraversableNodeNames = /*#__PURE__*/new Set(['html', 'body', '#document']);
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function isLastTraversableNode(node) {
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  return lastTraversableNodeNames.has(getNodeName(node));
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}
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function getComputedStyle(element) {
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  return getWindow(element).getComputedStyle(element);
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}
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function getNodeScroll(element) {
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  if (isElement(element)) {
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    return {
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      scrollLeft: element.scrollLeft,
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      scrollTop: element.scrollTop
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    };
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  }
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  return {
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    scrollLeft: element.scrollX,
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    scrollTop: element.scrollY
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  };
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}
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function getParentNode(node) {
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  if (getNodeName(node) === 'html') {
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    return node;
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  }
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  const result =
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  // Step into the shadow DOM of the parent of a slotted node.
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  node.assignedSlot ||
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  // DOM Element detected.
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  node.parentNode ||
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  // ShadowRoot detected.
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  isShadowRoot(node) && node.host ||
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  // Fallback.
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  getDocumentElement(node);
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  return isShadowRoot(result) ? result.host : result;
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}
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function getNearestOverflowAncestor(node) {
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  const parentNode = getParentNode(node);
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  if (isLastTraversableNode(parentNode)) {
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    return node.ownerDocument ? node.ownerDocument.body : node.body;
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  }
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  if (isHTMLElement(parentNode) && isOverflowElement(parentNode)) {
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    return parentNode;
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  }
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  return getNearestOverflowAncestor(parentNode);
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}
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function getOverflowAncestors(node, list, traverseIframes) {
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  var _node$ownerDocument2;
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  if (list === void 0) {
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    list = [];
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  }
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  if (traverseIframes === void 0) {
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    traverseIframes = true;
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  }
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  const scrollableAncestor = getNearestOverflowAncestor(node);
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  const isBody = scrollableAncestor === ((_node$ownerDocument2 = node.ownerDocument) == null ? void 0 : _node$ownerDocument2.body);
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  const win = getWindow(scrollableAncestor);
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  if (isBody) {
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    const frameElement = getFrameElement(win);
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    return list.concat(win, win.visualViewport || [], isOverflowElement(scrollableAncestor) ? scrollableAncestor : [], frameElement && traverseIframes ? getOverflowAncestors(frameElement) : []);
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  }
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  return list.concat(scrollableAncestor, getOverflowAncestors(scrollableAncestor, [], traverseIframes));
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}
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function getFrameElement(win) {
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  return win.parent && Object.getPrototypeOf(win.parent) ? win.frameElement : null;
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}
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export { getComputedStyle, getContainingBlock, getDocumentElement, getFrameElement, getNearestOverflowAncestor, getNodeName, getNodeScroll, getOverflowAncestors, getParentNode, getWindow, isContainingBlock, isElement, isHTMLElement, isLastTraversableNode, isNode, isOverflowElement, isShadowRoot, isTableElement, isTopLayer, isWebKit };
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