ai-course/node_modules/@dnd-kit/utilities/dist/utilities.esm.js

import { useMemo, useLayoutEffect, useEffect, useRef, useCallback } from 'react';

function useCombinedRefs() {
  for (var _len = arguments.length, refs = new Array(_len), _key = 0; _key < _len; _key++) {
    refs[_key] = arguments[_key];
  }

  return useMemo(() => node => {
    refs.forEach(ref => ref(node));
  }, // eslint-disable-next-line react-hooks/exhaustive-deps
  refs);
}

// https://github.com/facebook/react/blob/master/packages/shared/ExecutionEnvironment.js
const canUseDOM = typeof window !== 'undefined' && typeof window.document !== 'undefined' && typeof window.document.createElement !== 'undefined';

function isWindow(element) {
  const elementString = Object.prototype.toString.call(element);
  return elementString === '[object Window]' || // In Electron context the Window object serializes to [object global]
  elementString === '[object global]';
}

function isNode(node) {
  return 'nodeType' in node;
}

function getWindow(target) {
  var _target$ownerDocument, _target$ownerDocument2;

  if (!target) {
    return window;
  }

  if (isWindow(target)) {
    return target;
  }

  if (!isNode(target)) {
    return window;
  }

  return (_target$ownerDocument = (_target$ownerDocument2 = target.ownerDocument) == null ? void 0 : _target$ownerDocument2.defaultView) != null ? _target$ownerDocument : window;
}

function isDocument(node) {
  const {
    Document
  } = getWindow(node);
  return node instanceof Document;
}

function isHTMLElement(node) {
  if (isWindow(node)) {
    return false;
  }

  return node instanceof getWindow(node).HTMLElement;
}

function isSVGElement(node) {
  return node instanceof getWindow(node).SVGElement;
}

function getOwnerDocument(target) {
  if (!target) {
    return document;
  }

  if (isWindow(target)) {
    return target.document;
  }

  if (!isNode(target)) {
    return document;
  }

  if (isDocument(target)) {
    return target;
  }

  if (isHTMLElement(target) || isSVGElement(target)) {
    return target.ownerDocument;
  }

  return document;
}

/**
 * A hook that resolves to useEffect on the server and useLayoutEffect on the client
 * @param callback {function} Callback function that is invoked when the dependencies of the hook change
 */

const useIsomorphicLayoutEffect = canUseDOM ? useLayoutEffect : useEffect;

function useEvent(handler) {
  const handlerRef = useRef(handler);
  useIsomorphicLayoutEffect(() => {
    handlerRef.current = handler;
  });
  return useCallback(function () {
    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return handlerRef.current == null ? void 0 : handlerRef.current(...args);
  }, []);
}

function useInterval() {
  const intervalRef = useRef(null);
  const set = useCallback((listener, duration) => {
    intervalRef.current = setInterval(listener, duration);
  }, []);
  const clear = useCallback(() => {
    if (intervalRef.current !== null) {
      clearInterval(intervalRef.current);
      intervalRef.current = null;
    }
  }, []);
  return [set, clear];
}

function useLatestValue(value, dependencies) {
  if (dependencies === void 0) {
    dependencies = [value];
  }

  const valueRef = useRef(value);
  useIsomorphicLayoutEffect(() => {
    if (valueRef.current !== value) {
      valueRef.current = value;
    }
  }, dependencies);
  return valueRef;
}

function useLazyMemo(callback, dependencies) {
  const valueRef = useRef();
  return useMemo(() => {
    const newValue = callback(valueRef.current);
    valueRef.current = newValue;
    return newValue;
  }, // eslint-disable-next-line react-hooks/exhaustive-deps
  [...dependencies]);
}

function useNodeRef(onChange) {
  const onChangeHandler = useEvent(onChange);
  const node = useRef(null);
  const setNodeRef = useCallback(element => {
    if (element !== node.current) {
      onChangeHandler == null ? void 0 : onChangeHandler(element, node.current);
    }

    node.current = element;
  }, //eslint-disable-next-line
  []);
  return [node, setNodeRef];
}

function usePrevious(value) {
  const ref = useRef();
  useEffect(() => {
    ref.current = value;
  }, [value]);
  return ref.current;
}

let ids = {};
function useUniqueId(prefix, value) {
  return useMemo(() => {
    if (value) {
      return value;
    }

    const id = ids[prefix] == null ? 0 : ids[prefix] + 1;
    ids[prefix] = id;
    return prefix + "-" + id;
  }, [prefix, value]);
}

function createAdjustmentFn(modifier) {
  return function (object) {
    for (var _len = arguments.length, adjustments = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      adjustments[_key - 1] = arguments[_key];
    }

    return adjustments.reduce((accumulator, adjustment) => {
      const entries = Object.entries(adjustment);

      for (const [key, valueAdjustment] of entries) {
        const value = accumulator[key];

        if (value != null) {
          accumulator[key] = value + modifier * valueAdjustment;
        }
      }

      return accumulator;
    }, { ...object
    });
  };
}

const add = /*#__PURE__*/createAdjustmentFn(1);
const subtract = /*#__PURE__*/createAdjustmentFn(-1);

function hasViewportRelativeCoordinates(event) {
  return 'clientX' in event && 'clientY' in event;
}

function isKeyboardEvent(event) {
  if (!event) {
    return false;
  }

  const {
    KeyboardEvent
  } = getWindow(event.target);
  return KeyboardEvent && event instanceof KeyboardEvent;
}

function isTouchEvent(event) {
  if (!event) {
    return false;
  }

  const {
    TouchEvent
  } = getWindow(event.target);
  return TouchEvent && event instanceof TouchEvent;
}

/**
 * Returns the normalized x and y coordinates for mouse and touch events.
 */

function getEventCoordinates(event) {
  if (isTouchEvent(event)) {
    if (event.touches && event.touches.length) {
      const {
        clientX: x,
        clientY: y
      } = event.touches[0];
      return {
        x,
        y
      };
    } else if (event.changedTouches && event.changedTouches.length) {
      const {
        clientX: x,
        clientY: y
      } = event.changedTouches[0];
      return {
        x,
        y
      };
    }
  }

  if (hasViewportRelativeCoordinates(event)) {
    return {
      x: event.clientX,
      y: event.clientY
    };
  }

  return null;
}

const CSS = /*#__PURE__*/Object.freeze({
  Translate: {
    toString(transform) {
      if (!transform) {
        return;
      }

      const {
        x,
        y
      } = transform;
      return "translate3d(" + (x ? Math.round(x) : 0) + "px, " + (y ? Math.round(y) : 0) + "px, 0)";
    }

  },
  Scale: {
    toString(transform) {
      if (!transform) {
        return;
      }

      const {
        scaleX,
        scaleY
      } = transform;
      return "scaleX(" + scaleX + ") scaleY(" + scaleY + ")";
    }

  },
  Transform: {
    toString(transform) {
      if (!transform) {
        return;
      }

      return [CSS.Translate.toString(transform), CSS.Scale.toString(transform)].join(' ');
    }

  },
  Transition: {
    toString(_ref) {
      let {
        property,
        duration,
        easing
      } = _ref;
      return property + " " + duration + "ms " + easing;
    }

  }
});

const SELECTOR = 'a,frame,iframe,input:not([type=hidden]):not(:disabled),select:not(:disabled),textarea:not(:disabled),button:not(:disabled),*[tabindex]';
function findFirstFocusableNode(element) {
  if (element.matches(SELECTOR)) {
    return element;
  }

  return element.querySelector(SELECTOR);
}

export { CSS, add, canUseDOM, findFirstFocusableNode, getEventCoordinates, getOwnerDocument, getWindow, hasViewportRelativeCoordinates, isDocument, isHTMLElement, isKeyboardEvent, isNode, isSVGElement, isTouchEvent, isWindow, subtract, useCombinedRefs, useEvent, useInterval, useIsomorphicLayoutEffect, useLatestValue, useLazyMemo, useNodeRef, usePrevious, useUniqueId };
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