gui-one-nutui-react-taro/dist/esm/swiper.taro-f314d67a.js

京东风格的轻量级移动端 React 组件库，支持一套代码生成 H5 和小程序

import _asyncToGenerator from "@babel/runtime/helpers/asyncToGenerator";
import _slicedToArray from "@babel/runtime/helpers/slicedToArray";
import _objectWithoutProperties from "@babel/runtime/helpers/objectWithoutProperties";
import _defineProperty from "@babel/runtime/helpers/defineProperty";
import _typeof from "@babel/runtime/helpers/typeof";
var _excluded = ["children", "direction", "className", "pageContent", "onChange", "initPage", "paginationColor", "paginationVisible", "touchable", "isPreventDefault", "isStopPropagation", "autoPlay", "isCenter"];
import _regeneratorRuntime from "@babel/runtime/regenerator";
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); 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 = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
import React__default, { useRef, useState, useMemo, useEffect } from 'react';
import classNames from 'classnames';
import { nextTick, useReady, createSelectorQuery } from '@tarojs/taro';
import { D as DataContext } from './UserContext-b4181162.js';
import { c as cn } from './bem-893ad28d.js';
var defaultProps = {
  width: (typeof window === "undefined" ? "undefined" : _typeof(window)) === 'object' ? window.innerWidth : 375,
  height: 0,
  duration: 500,
  initPage: 0,
  autoPlay: 0,
  direction: 'horizontal',
  paginationColor: '#fff',
  paginationVisible: false,
  loop: true,
  touchable: true,
  isPreventDefault: true,
  isStopPropagation: true,
  isCenter: false,
  className: ''
};
var DISTANCE = 5;
var Swiper = React__default.forwardRef(function (props, ref) {
  var _classNames, _classNames2;
  var propSwiper = _objectSpread(_objectSpread({}, defaultProps), props);
  var children = propSwiper.children,
    direction = propSwiper.direction,
    className = propSwiper.className,
    pageContent = propSwiper.pageContent,
    onChange = propSwiper.onChange,
    initPage = propSwiper.initPage,
    paginationColor = propSwiper.paginationColor,
    paginationVisible = propSwiper.paginationVisible,
    touchable = propSwiper.touchable,
    isPreventDefault = propSwiper.isPreventDefault,
    isStopPropagation = propSwiper.isStopPropagation,
    autoPlay = propSwiper.autoPlay,
    isCenter = propSwiper.isCenter,
    rest = _objectWithoutProperties(propSwiper, _excluded);
  var container = useRef(null);
  var innerRef = useRef(null);
  var _swiper = useRef({
    moving: false,
    autoplayTimer: null,
    width: 0,
    height: 0,
    offset: 0,
    size: 0
  });
  var _useState = useState(Math.random().toString(36).slice(-8)),
    _useState2 = _slicedToArray(_useState, 1),
    refRandomId = _useState2[0];
  var isVertical = direction === 'vertical';
  var _useState3 = useState(null),
    _useState4 = _slicedToArray(_useState3, 2),
    rect = _useState4[0],
    setRect = _useState4[1];
  // eslint-disable-next-line prefer-const
  var _useState5 = useState(0),
    _useState6 = _slicedToArray(_useState5, 2),
    active = _useState6[0],
    setActive = _useState6[1];
  var _useState7 = useState(0),
    _useState8 = _slicedToArray(_useState7, 2),
    width = _useState8[0],
    setWidth = _useState8[1];
  var _useState9 = useState(0),
    _useState10 = _slicedToArray(_useState9, 2),
    height = _useState10[0],
    setHeight = _useState10[1];
  var _useState11 = useState(0),
    _useState12 = _slicedToArray(_useState11, 2),
    offset = _useState12[0],
    setOffset = _useState12[1];
  var _useState13 = useState([]),
    _useState14 = _slicedToArray(_useState13, 2),
    childOffset = _useState14[0],
    setChildOffset = _useState14[1];
  var _useState15 = useState(false),
    _useState16 = _slicedToArray(_useState15, 2),
    ready = _useState16[0],
    setReady = _useState16[1];
  var size = isVertical ? height : width;
  var _useState17 = useState({
      startX: 0,
      startY: 0,
      deltaX: 0,
      deltaY: 0,
      offsetX: 0,
      offsetY: 0,
      stateDirection: '',
      delta: 0,
      touchTime: 0
    }),
    _useState18 = _slicedToArray(_useState17, 2),
    touch = _useState18[0],
    setTouch = _useState18[1];
  var _useMemo = useMemo(function () {
      var childCount = 0;
      var childs = React__default.Children.map(props.children, function (child) {
        if (!React__default.isValidElement(child)) return null;
        childCount++;
        return child;
      });
      return {
        childs: childs,
        childCount: childCount
      };
    }, [props.children]),
    childs = _useMemo.childs,
    childCount = _useMemo.childCount;
  var trackSize = childCount * Number(size);
  // 父组件参数传入子组件item
  var parent = {
    propSwiper: propSwiper,
    size: size
  };
  var minOffset = function () {
    if (rect) {
      var base = isVertical ? rect === null || rect === void 0 ? void 0 : rect.height : rect === null || rect === void 0 ? void 0 : rect.width;
      return base - Number(size) * childCount;
    }
    return 0;
  }();
  // 清除定时器
  var stopAutoPlay = function stopAutoPlay() {
    clearTimeout(_swiper.current.autoplayTimer);
    _swiper.current.autoplayTimer = null;
  };
  // 定时轮播
  var autoplay = function autoplay() {
    if (propSwiper.autoPlay <= 0 || childCount <= 1) return;
    stopAutoPlay();
    _swiper.current.autoplayTimer = setTimeout(function () {
      next();
      autoplay();
    }, Number(propSwiper.autoPlay));
  };
  // 重置首尾位置信息
  var resettPosition = function resettPosition() {
    _swiper.current.moving = true;
    if (active <= -1) {
      move({
        pace: childCount
      });
    }
    if (active >= childCount) {
      move({
        pace: -childCount
      });
    }
  };
  // 上一页
  var prev = function prev() {
    resettPosition();
    touchReset();
    requestFrame(function () {
      requestFrame(function () {
        _swiper.current.moving = false;
        move({
          pace: -1,
          isEmit: true
        });
      });
    });
  };
  // 下一页
  var next = function next() {
    resettPosition();
    touchReset();
    requestFrame(function () {
      requestFrame(function () {
        _swiper.current.moving = false;
        move({
          pace: 1,
          isEmit: true
        });
      });
    });
  };
  // 前往指定页
  var to = function to(index) {
    resettPosition();
    touchReset();
    requestFrame(function () {
      requestFrame(function () {
        _swiper.current.moving = false;
        var targetIndex;
        if (props.loop && childCount === index) {
          targetIndex = active === 0 ? 0 : index;
        } else {
          targetIndex = index % childCount;
        }
        move({
          pace: targetIndex - active,
          isEmit: true
        });
      });
    });
  };
  // 切换方法
  var move = function move(_ref) {
    var _ref$pace = _ref.pace,
      pace = _ref$pace === void 0 ? 0 : _ref$pace,
      _ref$offset = _ref.offset,
      offset = _ref$offset === void 0 ? 0 : _ref$offset,
      _ref$isEmit = _ref.isEmit,
      isEmit = _ref$isEmit === void 0 ? false : _ref$isEmit,
      _ref$movingStatus = _ref.movingStatus,
      movingStatus = _ref$movingStatus === void 0 ? false : _ref$movingStatus;
    if (childCount <= 1) return;
    var targetActive = getActive(pace);
    // 父级容器偏移量
    var targetOffset = getOffset(targetActive, offset);
    // 如果循环，调整开头结尾图片位置
    if (props.loop) {
      if (Array.isArray(children) && children[0] && targetOffset !== minOffset) {
        var rightBound = targetOffset < minOffset;
        childOffset[0] = rightBound ? trackSize : 0;
      }
      if (Array.isArray(children) && children[childCount - 1] && targetOffset !== 0) {
        var leftBound = targetOffset > 0;
        childOffset[childCount - 1] = leftBound ? -trackSize : 0;
      }
      setChildOffset(childOffset);
    }
    if (isEmit && active !== targetActive) {
      props.onChange && props.onChange((targetActive + childCount) % childCount);
    }
    active = targetActive;
    setActive(targetActive);
    setOffset(targetOffset);
    getStyle(targetOffset);
  };
  // 确定当前active 元素
  var getActive = function getActive(pace) {
    if (pace) {
      var _active = active + pace;
      if (props.loop) {
        return range(_active, -1, childCount);
      }
      return range(_active, 0, childCount - 1);
    }
    return active;
  };
  // 计算位移
  var getOffset = function getOffset(active) {
    var offset = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
    var currentPosition = active * Number(size);
    if (!props.loop) {
      currentPosition = Math.min(currentPosition, -minOffset);
    }
    var targetOffset = offset - currentPosition;
    if (!props.loop) {
      targetOffset = range(targetOffset, minOffset, 0);
    }
    return targetOffset;
  };
  // 浏览器 帧 事件
  var requestFrame = function requestFrame(fn) {
    window.requestAnimationFrame.call(window, fn);
  };
  // 取值 方法
  var range = function range(num, min, max) {
    return Math.min(Math.max(num, min), max);
  };
  var getDirection = function getDirection(x, y) {
    if (x > y && x > DISTANCE) return 'horizontal';
    if (y > x && y > DISTANCE) return 'vertical';
    return '';
  };
  // 重置 全部位移信息
  var touchReset = function touchReset() {
    touch.startX = 0;
    touch.startY = 0;
    touch.deltaX = 0;
    touch.deltaY = 0;
    touch.offsetX = 0;
    touch.offsetY = 0;
    touch.delta = 0;
    touch.stateDirection = '';
    touch.touchTime = 0;
  };
  // 触摸事件开始
  var touchStart = function touchStart(e) {
    touchReset();
    touch.startX = e.touches[0].clientX;
    touch.startY = e.touches[0].clientY;
  };
  // 触摸事件移动
  var touchMove = function touchMove(e) {
    touch.deltaX = e.touches[0].clientX - touch.startX;
    touch.deltaY = e.touches[0].clientY - touch.startY;
    touch.offsetX = Math.abs(touch.deltaX);
    touch.offsetY = Math.abs(touch.deltaY);
    touch.delta = isVertical ? touch.deltaY : touch.deltaX;
    if (!touch.stateDirection) {
      touch.stateDirection = getDirection(touch.offsetX, touch.offsetY);
    }
  };
  var b = cn('swiper');
  var classes = classNames(b(''));
  var contentClass = classNames((_classNames = {}, _defineProperty(_classNames, "".concat(b('inner')), true), _defineProperty(_classNames, "".concat(b('vertical')), isVertical), _classNames));
  var getStyle = function getStyle() {
    var moveOffset = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : offset;
    var target = innerRef.current;
    var _offset = 0;
    if (!isCenter) {
      _offset = moveOffset;
    } else {
      var _size = isVertical ? height : width;
      var val = isVertical ? (rect === null || rect === void 0 ? void 0 : rect.height) - _size : (rect === null || rect === void 0 ? void 0 : rect.width) - _size;
      _offset = moveOffset + (active === childCount - 1 && !props.loop ? -val / 2 : val / 2);
    }
    target.style.transitionDuration = "".concat(_swiper.current.moving ? 0 : props.duration, "ms");
    target.style[isVertical ? 'height' : 'width'] = "".concat(Number(size) * childCount, "px");
    target.style[isVertical ? 'width' : 'height'] = "".concat(isVertical ? width : height, "px");
    target.style.transform = "translate3D".concat(!isVertical ? "(".concat(_offset, "px,0,0)") : "(0,".concat(_offset, "px,0)"));
  };
  var onTouchStart = function onTouchStart(e) {
    if (props.isPreventDefault) e.preventDefault();
    if (props.isStopPropagation) e.stopPropagation();
    if (!props.touchable) return;
    touchStart(e);
    touch.touchTime = Date.now();
    stopAutoPlay();
    resettPosition();
  };
  var onTouchMove = function onTouchMove(e) {
    if (props.touchable && _swiper.current.moving) {
      touchMove(e);
      if (touch.stateDirection === props.direction) {
        move({
          offset: touch.delta
        });
      }
    }
  };
  var onTouchEnd = function onTouchEnd(e) {
    if (!props.touchable || !_swiper.current.moving) return;
    var speed = touch.delta / (Date.now() - touch.touchTime);
    var isShouldMove = Math.abs(speed) > 0.3 || Math.abs(touch.delta) > +(size / 2).toFixed(2);
    var pace = 0;
    _swiper.current.moving = false;
    if (isShouldMove && touch.stateDirection === props.direction) {
      var _offset2 = isVertical ? touch.offsetY : touch.offsetX;
      if (props.loop) {
        if (_offset2 > 0) {
          pace = touch.delta > 0 ? -1 : 1;
        } else {
          pace = 0;
        }
      } else {
        pace = -Math[touch.delta > 0 ? 'ceil' : 'floor'](touch.delta / size);
      }
      move({
        pace: pace,
        isEmit: true
      });
    } else if (touch.delta) {
      move({
        pace: 0
      });
    } else {
      getStyle();
    }
    autoplay();
  };
  useEffect(function () {
    _swiper.current.activePagination = (active + childCount) % childCount;
  }, [active]);
  var queryRect = function queryRect(element) {
    return new Promise(function (resolve) {
      var query = createSelectorQuery();
      query.select("#".concat(element.id)) && query.select("#".concat(element.id)).boundingClientRect();
      query.exec(function (res) {
        resolve(res[0]);
      });
    });
  };
  var init = /*#__PURE__*/function () {
    var _ref2 = _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime.mark(function _callee() {
      var active,
        rect,
        _active,
        _width,
        _height,
        targetOffset,
        _args = arguments;
      return _regeneratorRuntime.wrap(function _callee$(_context) {
        while (1) {
          switch (_context.prev = _context.next) {
            case 0:
              active = _args.length > 0 && _args[0] !== undefined ? _args[0] : +propSwiper.initPage;
              _context.next = 3;
              return queryRect(container.current);
            case 3:
              rect = _context.sent;
              _active = Math.max(Math.min(childCount - 1, active), 0);
              _width = propSwiper.width ? +propSwiper.width : rect === null || rect === void 0 ? void 0 : rect.width;
              _height = propSwiper.height ? +propSwiper.height : rect === null || rect === void 0 ? void 0 : rect.height;
              size = isVertical ? _height : _width;
              trackSize = childCount * Number(size);
              targetOffset = getOffset(_active);
              _swiper.current.moving = true;
              if (ready) {
                _swiper.current.moving = false;
              }
              setRect(rect);
              setActive(_active);
              setWidth(_width);
              setHeight(_height);
              setOffset(targetOffset);
              setReady(true);
            case 18:
            case "end":
              return _context.stop();
          }
        }
      }, _callee);
    }));
    return function init() {
      return _ref2.apply(this, arguments);
    };
  }();
  useEffect(function () {
    if (ready) {
      getStyle();
    }
  }, [isVertical, width, height, offset, ready]);
  useEffect(function () {
    if (ready) {
      stopAutoPlay();
      autoplay();
    }
    return function () {
      setReady(false);
    };
  }, [ready]);
  useEffect(function () {
    stopAutoPlay();
    autoplay();
  }, [children]);
  useEffect(function () {
    nextTick(function () {
      init();
    });
  }, [propSwiper.initPage]);
  useEffect(function () {
    return function () {
      stopAutoPlay();
    };
  }, []);
  useReady(function () {
    nextTick(function () {
      init();
    });
  });
  var itemStyle = function itemStyle(index) {
    var style = {};
    var _direction = propSwiper.direction || direction;
    var _size = size;
    if (_size) {
      style[_direction === 'horizontal' ? 'width' : 'height'] = "".concat(_size, "px");
    }
    var offset = childOffset[index];
    if (offset) {
      style.transform = "translate3D".concat(_direction === 'horizontal' ? "(".concat(offset, "px,0,0)") : "(0,".concat(offset, "px,0)"));
    }
    return style;
  };
  React__default.useImperativeHandle(ref, function () {
    return {
      to: to,
      next: next,
      prev: prev
    };
  });
  return React__default.createElement(DataContext.Provider, {
    value: parent
  }, React__default.createElement("view", _objectSpread(_objectSpread({
    className: "".concat(classes, " ").concat(className),
    ref: container
  }, rest), {}, {
    id: "container-".concat(refRandomId),
    onTouchStart: onTouchStart,
    onTouchMove: onTouchMove,
    onTouchEnd: onTouchEnd,
    // @ts-ignore
    catchMove: isVertical
  }), React__default.createElement("div", {
    className: contentClass,
    ref: innerRef
  }, React__default.Children.map(childs, function (child, index) {
    return React__default.createElement("div", {
      className: b('item-wrapper'),
      style: itemStyle(index),
      key: index
    }, child);
  })), propSwiper.paginationVisible && !('pageContent' in propSwiper) ? React__default.createElement("div", {
    className: classNames((_classNames2 = {}, _defineProperty(_classNames2, "".concat(b('pagination')), true), _defineProperty(_classNames2, "".concat(b('pagination-vertical')), isVertical), _classNames2))
  }, React__default.Children.map(childs, function (item, index) {
    var _classNames3;
    return React__default.createElement("i", {
      style: (active + childCount) % childCount === index ? {
        backgroundColor: propSwiper.paginationColor
      } : undefined,
      className: classNames((_classNames3 = {}, _defineProperty(_classNames3, "".concat(b('pagination-item')), true), _defineProperty(_classNames3, "active", (active + childCount) % childCount === index), _classNames3)),
      key: index
    });
  })) : React__default.createElement("div", null, pageContent)));
});
Swiper.defaultProps = defaultProps;
Swiper.displayName = 'NutSwiper';
export { Swiper as S };