data-vis-ui/es/components/Scroll/index.js

## [使用文档](https://temp-static-domain.jd.com/data-vis-ui)

function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); Object.defineProperty(subClass, "prototype", { writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

/*
 * @Author: 石丽丽
 * @description : 滚动
 * @@copyRight: 京东科技IOT
 */
import React from 'react';
var DEFAULT_PROPS = {
  fps: 60,
  speed: 30,
  style: {},
  className: '',
  reverse: false,
  mode: 'vertical'
};

var Scroll = /*#__PURE__*/function (_React$PureComponent) {
  _inherits(Scroll, _React$PureComponent);

  var _super = _createSuper(Scroll);

  function Scroll() {
    var _this;

    _classCallCheck(this, Scroll);

    _this = _super.apply(this, arguments);
    _this.containerDom = null;
    _this.wrapperDom = null;
    _this.sliderDom = null;
    _this.sliderDomCopy = null;
    _this.requestID = 0;
    _this.state = {
      step: 1,
      sliderSize: 0,
      containerSize: 0
    };

    _this.init = function () {
      var _this$props = _this.props,
          _this$props$speed = _this$props.speed,
          speed = _this$props$speed === void 0 ? DEFAULT_PROPS.speed : _this$props$speed,
          _this$props$mode = _this$props.mode,
          mode = _this$props$mode === void 0 ? DEFAULT_PROPS.mode : _this$props$mode;
      var step = parseFloat((speed / DEFAULT_PROPS.fps).toFixed(2));
      var sliderSize = mode === 'vertical' ? _this.sliderDom.offsetHeight : _this.sliderDom.offsetWidth;
      var containerSize = mode === 'vertical' ? _this.containerDom.clientHeight : _this.containerDom.clientWidth;

      _this.setState({
        step: step,
        sliderSize: sliderSize,
        containerSize: containerSize
      }, function () {
        cancelAnimationFrame(_this.requestID);

        if (sliderSize > containerSize) {
          _this.sliderDomCopy.innerHTML = _this.sliderDom.innerHTML;
          _this.requestID = requestAnimationFrame(_this.marquee);

          _this.containerDom.onmouseover = function () {
            cancelAnimationFrame(_this.requestID);
          };

          _this.containerDom.onmouseout = function () {
            cancelAnimationFrame(_this.requestID);
            _this.requestID = requestAnimationFrame(_this.marquee);
          };
        } else {
          _this.sliderDomCopy.innerHTML = '';
          _this.containerDom.onmouseover = null;
          _this.containerDom.onmouseout = null;
        }
      });
    };
    /**marquee */


    _this.marquee = function () {
      var _this$state = _this.state,
          sliderSize = _this$state.sliderSize,
          step = _this$state.step;
      var _this$props2 = _this.props,
          _this$props2$reverse = _this$props2.reverse,
          reverse = _this$props2$reverse === void 0 ? DEFAULT_PROPS.reverse : _this$props2$reverse,
          _this$props2$mode = _this$props2.mode,
          mode = _this$props2$mode === void 0 ? DEFAULT_PROPS.mode : _this$props2$mode;
      var key = mode === 'vertical' ? 'top' : 'left';
      var position = parseFloat(_this.getStyle(_this.wrapperDom, key));

      if (reverse) {
        if (position >= 0) {
          _this.wrapperDom.style[key] = "-".concat(sliderSize, "px");
        } else {
          _this.wrapperDom.style[key] = "".concat(position + step, "px");
        }
      } else {
        if (sliderSize - Math.abs(position) <= 0) {
          _this.wrapperDom.style[key] = '0px';
        } else {
          _this.wrapperDom.style[key] = "".concat(position - step, "px");
        }
      }

      cancelAnimationFrame(_this.requestID);
      _this.requestID = requestAnimationFrame(_this.marquee);
    };

    _this.getStyle = function (ele, attr) {
      if (window.getComputedStyle) {
        return window.getComputedStyle(ele)[attr];
      }

      return ele.currentStyle[attr];
    };

    return _this;
  }

  _createClass(Scroll, [{
    key: "componentDidMount",
    value: function componentDidMount() {
      this.init();
    }
  }, {
    key: "componentDidUpdate",
    value: function componentDidUpdate(prevProps) {
      var _this$props3 = this.props,
          children = _this$props3.children,
          speed = _this$props3.speed,
          style = _this$props3.style,
          className = _this$props3.className,
          mode = _this$props3.mode;

      if (children !== prevProps.children || speed !== prevProps.speed || style !== prevProps.style || className !== prevProps.className || mode !== prevProps.mode) {
        this.init();
      }
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      cancelAnimationFrame(this.requestID);
    } // 检测dom宽高变更

  }, {
    key: "render",
    value: function render() {
      var _this2 = this;

      var _this$props4 = this.props,
          children = _this$props4.children,
          _this$props4$style = _this$props4.style,
          style = _this$props4$style === void 0 ? DEFAULT_PROPS.style : _this$props4$style,
          _this$props4$classNam = _this$props4.className,
          className = _this$props4$classNam === void 0 ? DEFAULT_PROPS.className : _this$props4$classNam,
          _this$props4$mode = _this$props4.mode,
          mode = _this$props4$mode === void 0 ? DEFAULT_PROPS.mode : _this$props4$mode;
      var containerStyle = {
        position: 'relative',
        overflow: 'hidden',
        width: '100%',
        height: '100%'
      };
      var WrapperStyle = {
        position: 'absolute',
        top: 0,
        left: 0,
        right: mode === 'vertical' ? 0 : 'auto',
        bottom: mode === 'vertical' ? 'auto' : 0,
        whiteSpace: mode === 'vertical' ? 'normal' : 'nowrap'
      };
      var sliderStyle = {
        display: mode === 'vertical' ? 'block' : 'inline-block'
      };
      return /*#__PURE__*/React.createElement("div", {
        className: className,
        ref: function ref(dom) {
          return _this2.containerDom = dom;
        },
        style: Object.assign(Object.assign({}, containerStyle), style)
      }, /*#__PURE__*/React.createElement("div", {
        ref: function ref(dom) {
          return _this2.wrapperDom = dom;
        },
        style: WrapperStyle
      }, /*#__PURE__*/React.createElement("div", {
        style: sliderStyle,
        ref: function ref(dom) {
          return _this2.sliderDom = dom;
        }
      }, children), /*#__PURE__*/React.createElement("div", {
        style: sliderStyle,
        ref: function ref(dom) {
          return _this2.sliderDomCopy = dom;
        }
      })));
    }
  }]);

  return Scroll;
}(React.PureComponent);

export default Scroll;