{"ast":null,"code":"function _typeof(obj) {\n  \"@babel/helpers - typeof\";\n\n  if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {\n    _typeof = function _typeof(obj) {\n      return typeof obj;\n    };\n  } else {\n    _typeof = function _typeof(obj) {\n      return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n    };\n  }\n\n  return _typeof(obj);\n}\n\nfunction _defineProperty(obj, key, value) {\n  if (key in obj) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n  } else {\n    obj[key] = value;\n  }\n\n  return obj;\n}\n\nfunction _classCallCheck(instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n}\n\nfunction _defineProperties(target, props) {\n  for (var i = 0; i < props.length; i++) {\n    var descriptor = props[i];\n    descriptor.enumerable = descriptor.enumerable || false;\n    descriptor.configurable = true;\n    if (\"value\" in descriptor) descriptor.writable = true;\n    Object.defineProperty(target, descriptor.key, descriptor);\n  }\n}\n\nfunction _createClass(Constructor, protoProps, staticProps) {\n  if (protoProps) _defineProperties(Constructor.prototype, protoProps);\n  if (staticProps) _defineProperties(Constructor, staticProps);\n  return Constructor;\n}\n\nfunction _inherits(subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function\");\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) _setPrototypeOf(subClass, superClass);\n}\n\nfunction _setPrototypeOf(o, p) {\n  _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {\n    o.__proto__ = p;\n    return o;\n  };\n\n  return _setPrototypeOf(o, p);\n}\n\nfunction _createSuper(Derived) {\n  var hasNativeReflectConstruct = _isNativeReflectConstruct();\n\n  return function _createSuperInternal() {\n    var Super = _getPrototypeOf(Derived),\n        result;\n\n    if (hasNativeReflectConstruct) {\n      var NewTarget = _getPrototypeOf(this).constructor;\n\n      result = Reflect.construct(Super, arguments, NewTarget);\n    } else {\n      result = Super.apply(this, arguments);\n    }\n\n    return _possibleConstructorReturn(this, result);\n  };\n}\n\nfunction _possibleConstructorReturn(self, call) {\n  if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) {\n    return call;\n  }\n\n  return _assertThisInitialized(self);\n}\n\nfunction _assertThisInitialized(self) {\n  if (self === void 0) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return self;\n}\n\nfunction _isNativeReflectConstruct() {\n  if (typeof Reflect === \"undefined\" || !Reflect.construct) return false;\n  if (Reflect.construct.sham) return false;\n  if (typeof Proxy === \"function\") return true;\n\n  try {\n    Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n\nfunction _getPrototypeOf(o) {\n  _getPrototypeOf = Object.setPrototypeOf ? 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_this.onMouseUp);\n\n      _this.scrollbarRef.current.removeEventListener('touchstart', _this.onScrollbarTouchStart);\n\n      _this.thumbRef.current.removeEventListener('touchstart', _this.onMouseDown);\n\n      _this.thumbRef.current.removeEventListener('touchmove', _this.onMouseMove);\n\n      _this.thumbRef.current.removeEventListener('touchend', _this.onMouseUp);\n\n      raf.cancel(_this.moveRaf);\n    }; // ======================= Thumb =======================\n\n\n    _this.onMouseDown = function (e) {\n      var onStartMove = _this.props.onStartMove;\n\n      _this.setState({\n        dragging: true,\n        pageY: getPageY(e),\n        startTop: _this.getTop()\n      });\n\n      onStartMove();\n\n      _this.patchEvents();\n\n      e.stopPropagation();\n      e.preventDefault();\n    };\n\n    _this.onMouseMove = function (e) {\n      var _this$state = _this.state,\n          dragging = _this$state.dragging,\n          pageY = _this$state.pageY,\n          startTop = 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descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\nfunction _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\nfunction _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 } }); if (superClass) _setPrototypeOf(subClass, superClass); }\n\nfunction _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }\n\nfunction _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); }; }\n\nfunction _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === \"object\" || typeof call === \"function\")) { return call; } return _assertThisInitialized(self); }\n\nfunction _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\"); } return self; }\n\nfunction _isNativeReflectConstruct() { if (typeof Reflect === \"undefined\" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === \"function\") return true; try { Date.prototype.toString.call(Reflect.construct(Date, [], function () {})); return true; } catch (e) { return false; } }\n\nfunction _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }\n\nimport * as React from 'react';\nimport classNames from 'classnames';\nimport raf from \"rc-util/es/raf\";\nvar MIN_SIZE = 20;\n\nfunction getPageY(e) {\n  return 'touches' in e ? e.touches[0].pageY : e.pageY;\n}\n\nvar ScrollBar = /*#__PURE__*/function (_React$Component) {\n  _inherits(ScrollBar, _React$Component);\n\n  var _super = _createSuper(ScrollBar);\n\n  function ScrollBar() {\n    var _this;\n\n    _classCallCheck(this, ScrollBar);\n\n    _this = _super.apply(this, arguments);\n    _this.moveRaf = null;\n    _this.scrollbarRef = /*#__PURE__*/React.createRef();\n    _this.thumbRef = /*#__PURE__*/React.createRef();\n    _this.visibleTimeout = null;\n    _this.state = {\n      dragging: false,\n      pageY: null,\n      startTop: null,\n      visible: false\n    };\n\n    _this.delayHidden = function () {\n      clearTimeout(_this.visibleTimeout);\n\n      _this.setState({\n        visible: true\n      });\n\n      _this.visibleTimeout = setTimeout(function () {\n        _this.setState({\n          visible: false\n        });\n      }, 2000);\n    };\n\n    _this.onScrollbarTouchStart = function (e) {\n      e.preventDefault();\n    };\n\n    _this.onContainerMouseDown = function (e) {\n      e.stopPropagation();\n      e.preventDefault();\n    }; // ======================= Clean =======================\n\n\n    _this.patchEvents = function () {\n      window.addEventListener('mousemove', _this.onMouseMove);\n      window.addEventListener('mouseup', _this.onMouseUp);\n\n      _this.thumbRef.current.addEventListener('touchmove', _this.onMouseMove);\n\n      _this.thumbRef.current.addEventListener('touchend', _this.onMouseUp);\n    };\n\n    _this.removeEvents = function () {\n      window.removeEventListener('mousemove', _this.onMouseMove);\n      window.removeEventListener('mouseup', _this.onMouseUp);\n\n      _this.scrollbarRef.current.removeEventListener('touchstart', _this.onScrollbarTouchStart);\n\n      _this.thumbRef.current.removeEventListener('touchstart', _this.onMouseDown);\n\n      _this.thumbRef.current.removeEventListener('touchmove', _this.onMouseMove);\n\n      _this.thumbRef.current.removeEventListener('touchend', _this.onMouseUp);\n\n      raf.cancel(_this.moveRaf);\n    }; // ======================= Thumb =======================\n\n\n    _this.onMouseDown = function (e) {\n      var onStartMove = _this.props.onStartMove;\n\n      _this.setState({\n        dragging: true,\n        pageY: getPageY(e),\n        startTop: _this.getTop()\n      });\n\n      onStartMove();\n\n      _this.patchEvents();\n\n      e.stopPropagation();\n      e.preventDefault();\n    };\n\n    _this.onMouseMove = function (e) {\n      var _this$state = _this.state,\n          dragging = _this$state.dragging,\n          pageY = _this$state.pageY,\n          startTop = _this$state.startTop;\n      var onScroll = _this.props.onScroll;\n      raf.cancel(_this.moveRaf);\n\n      if (dragging) {\n        var offsetY = getPageY(e) - pageY;\n        var newTop = startTop + offsetY;\n\n        var enableScrollRange = _this.getEnableScrollRange();\n\n        var enableHeightRange = _this.getEnableHeightRange();\n\n        var ptg = enableHeightRange ? newTop / enableHeightRange : 0;\n        var newScrollTop = Math.ceil(ptg * enableScrollRange);\n        _this.moveRaf = raf(function () {\n          onScroll(newScrollTop);\n        });\n      }\n    };\n\n    _this.onMouseUp = function () {\n      var onStopMove = _this.props.onStopMove;\n\n      _this.setState({\n        dragging: false\n      });\n\n      onStopMove();\n\n      _this.removeEvents();\n    }; // ===================== Calculate =====================\n\n\n    _this.getSpinHeight = function () {\n      var _this$props = _this.props,\n          height = _this$props.height,\n          count = _this$props.count;\n      var baseHeight = height / count * 10;\n      baseHeight = Math.max(baseHeight, MIN_SIZE);\n      baseHeight = Math.min(baseHeight, height / 2);\n      return Math.floor(baseHeight);\n    };\n\n    _this.getEnableScrollRange = function () {\n      var _this$props2 = _this.props,\n          scrollHeight = _this$props2.scrollHeight,\n          height = _this$props2.height;\n      return scrollHeight - height || 0;\n    };\n\n    _this.getEnableHeightRange = function () {\n      var height = _this.props.height;\n\n      var spinHeight = _this.getSpinHeight();\n\n      return height - spinHeight || 0;\n    };\n\n    _this.getTop = function () {\n      var scrollTop = _this.props.scrollTop;\n\n      var enableScrollRange = _this.getEnableScrollRange();\n\n      var enableHeightRange = _this.getEnableHeightRange();\n\n      if (scrollTop === 0 || enableScrollRange === 0) {\n        return 0;\n      }\n\n      var ptg = scrollTop / enableScrollRange;\n      return ptg * enableHeightRange;\n    }; // Not show scrollbar when height is large thane scrollHeight\n\n\n    _this.getVisible = function () {\n      var visible = _this.state.visible;\n      var _this$props3 = _this.props,\n          height = _this$props3.height,\n          scrollHeight = _this$props3.scrollHeight;\n\n      if (height >= scrollHeight) {\n        return false;\n      }\n\n      return visible;\n    };\n\n    return _this;\n  }\n\n  _createClass(ScrollBar, [{\n    key: \"componentDidMount\",\n    value: function componentDidMount() {\n      this.scrollbarRef.current.addEventListener('touchstart', this.onScrollbarTouchStart);\n      this.thumbRef.current.addEventListener('touchstart', this.onMouseDown);\n    }\n  }, {\n    key: \"componentDidUpdate\",\n    value: function componentDidUpdate(prevProps) {\n      if (prevProps.scrollTop !== this.props.scrollTop) {\n        this.delayHidden();\n      }\n    }\n  }, {\n    key: \"componentWillUnmount\",\n    value: function componentWillUnmount() {\n      this.removeEvents();\n      clearTimeout(this.visibleTimeout);\n    } // ====================== Render =======================\n\n  }, {\n    key: \"render\",\n    value: function render() {\n      var dragging = this.state.dragging;\n      var prefixCls = this.props.prefixCls;\n      var spinHeight = this.getSpinHeight();\n      var top = this.getTop();\n      var visible = this.getVisible();\n      return /*#__PURE__*/React.createElement(\"div\", {\n        ref: this.scrollbarRef,\n        className: \"\".concat(prefixCls, \"-scrollbar\"),\n        style: {\n          width: 8,\n          top: 0,\n          bottom: 0,\n          right: 0,\n          position: 'absolute',\n          display: visible ? null : 'none'\n        },\n        onMouseDown: this.onContainerMouseDown,\n        onMouseMove: this.delayHidden\n      }, /*#__PURE__*/React.createElement(\"div\", {\n        ref: this.thumbRef,\n        className: classNames(\"\".concat(prefixCls, \"-scrollbar-thumb\"), _defineProperty({}, \"\".concat(prefixCls, \"-scrollbar-thumb-moving\"), dragging)),\n        style: {\n          width: '100%',\n          height: spinHeight,\n          top: top,\n          left: 0,\n          position: 'absolute',\n          background: 'rgba(0, 0, 0, 0.5)',\n          borderRadius: 99,\n          cursor: 'pointer',\n          userSelect: 'none'\n        },\n        onMouseDown: this.onMouseDown\n      }));\n    }\n  }]);\n\n  return ScrollBar;\n}(React.Component);\n\nexport { ScrollBar as default };"]},"metadata":{},"sourceType":"module"}