@vnmfify/core/notice-bar/notice-bar.js

```shell npm i @vnmfify/core -S ```

var _excluded = ["className", "delay", "speed", "wordwrap", "scrollable", "children"];

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) { symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); } keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

import { View } from "@vnxjs/components";
import { nextTick } from "@vnxjs/vnmf";
import classNames from "classnames";
import * as React from "react";
import { Children, isValidElement, useEffect, useMemo, useRef, useState } from "react";
import { prefixClassname } from "../styles";
import { getRect } from "../utils/dom/rect";
import { addUnitPx } from "../utils/format/unit";
import { doubleRaf } from "../utils/raf";
import { NoticeBarAction } from "./notice-bar-action";
import { NoticeBarIcon } from "./notice-bar-icon";

function useChildren(children) {
  var __children__ = {
    icon: undefined,
    text: [],
    action: undefined
  };
  Children.forEach(children, child => {
    if ( /*#__PURE__*/isValidElement(child)) {
      var element = child;
      var elementType = element.type;

      if (elementType === NoticeBarIcon) {
        __children__.icon = element;
      } else if (elementType === NoticeBarAction) {
        __children__.action = element;
      } else {
        __children__.text.push(child);
      }
    } else {
      __children__.text.push(child);
    }
  });
  return __children__;
}

function NoticeBar(props) {
  var {
    className,
    delay = 1000,
    speed = 60,
    wordwrap,
    scrollable = false,
    children: childrenProp
  } = props,
      restProps = _objectWithoutProperties(props, _excluded);

  var {
    icon,
    text,
    action
  } = useChildren(childrenProp);
  var ellipsis = !scrollable && !wordwrap;
  var startTimerRef = useRef();
  var wrapRef = useRef();
  var contentRef = useRef();
  var [offset, setOffset] = useState(0);
  var [duration, setDuration] = useState(0);
  var wrapWidthRef = useRef(0);
  var contentWidthRef = useRef(0);
  var contentStyle = useMemo(() => ({
    transform: offset ? "translateX(".concat(addUnitPx(offset), ")") : "",
    transitionDuration: "".concat(duration, "s")
  }), [offset, duration]);

  function reset() {
    wrapWidthRef.current = 0;
    contentWidthRef.current = 0;
    setOffset(0);
    setDuration(0);
  }

  function onTransitionEnd() {
    setOffset(wrapWidthRef.current);
    setDuration(0);
    nextTick(() => {
      doubleRaf(() => {
        setOffset(-contentWidthRef.current);
        setDuration((contentWidthRef.current + wrapWidthRef.current) / +speed);
      });
    });
  }

  function start() {
    reset();

    if (startTimerRef.current) {
      clearTimeout(startTimerRef.current);
    }

    startTimerRef.current = setTimeout( /*#__PURE__*/_asyncToGenerator(function* () {
      if (!wrapRef.current || !contentRef.current || !scrollable) {
        return;
      }

      nextTick(() => Promise.all([getRect(wrapRef), getRect(contentRef)]).then(_ref2 => {
        var [{
          width: wrapRefWidth
        }, {
          width: contentRefWidth
        }] = _ref2;

        if (scrollable || contentRefWidth > wrapRefWidth) {
          doubleRaf(() => {
            wrapWidthRef.current = wrapRefWidth;
            contentWidthRef.current = contentRefWidth;
            setOffset(-contentRefWidth);
            setDuration(contentRefWidth / +speed);
          });
        }
      }));
    }), +delay);
  }

  useEffect(start, []);
  return /*#__PURE__*/React.createElement(View, _objectSpread({
    className: classNames(prefixClassname("notice-bar"), {
      [prefixClassname("notice-bar--wordwrap")]: wordwrap
    }, className)
  }, restProps), icon, /*#__PURE__*/React.createElement(View, {
    ref: wrapRef,
    className: prefixClassname("notice-bar__wrap")
  }, /*#__PURE__*/React.createElement(View, {
    ref: contentRef,
    style: contentStyle,
    className: classNames(prefixClassname("notice-bar__content"), {
      [prefixClassname("ellipsis")]: ellipsis
    }),
    children: text,
    onTransitionEnd: onTransitionEnd
  })), action);
}

export default NoticeBar;
//# sourceMappingURL=notice-bar.js.map